diff --git a/CHANGES.txt b/CHANGES.txt
index 9dda1b5c..d791775a 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,8 @@
 CHANGES
 
+8.1.0 (Oct 5, 2022)
+- Added a new impressions mode for the SDK called NONE , to be used in factory when there is no desire to capture impressions on an SDK factory to feed Split's analytics engine. Running NONE mode, the SDK will only capture unique keys evaluated for a particular feature flag instead of full blown impressions.
+
 8.0.1 (Jul 20, 2022)
 - Updated dependencies to support faraday > 2.0
 
@@ -49,9 +52,10 @@ CHANGES
 - Updated ably error handling. 
 
 7.2.0 (Sep 25, 2020)
-- Added deduplication logic for impressions data.
-  - Now there are two modes for Impressions when the SDK is in standalone mode, OPTIMIZED (default) that only ships unique impressions and DEBUG for times where you need to send ALL impressions to debug an integration.
-  - Impression listener remains unchanged and will still get all impressions.
+- Added impressions dedupe logic to avoid sending duplicated impressions:  
+  - Added `OPTIMIZED` and `DEBUG` modes in order to enabling/disabling how impressions are going to be sent into Split servers,
+    - `OPTIMIZED`: will send unique impressions in a timeframe in order to reduce how many times impressions are posted to Split.
+    - `DEBUG`: will send every impression generated to Split.
 
 7.1.3 (Jul 31, 2020)
 - Updated rake development dependency to ~> 12.3.3.
diff --git a/lib/splitclient-rb/cache/senders/impressions_adapter/redis_sender.rb b/lib/splitclient-rb/cache/senders/impressions_adapter/redis_sender.rb
index 53f1593f..8b7b86ac 100644
--- a/lib/splitclient-rb/cache/senders/impressions_adapter/redis_sender.rb
+++ b/lib/splitclient-rb/cache/senders/impressions_adapter/redis_sender.rb
@@ -12,7 +12,9 @@ def initialize(config)
         end
 
         def record_uniques_key(uniques)
-          formatted = uniques_formatter(uniques)
+          return if uniques.nil? || uniques == {}
+
+          formatted = uniques_formatter(uniques).to_json
 
           unless formatted.nil?
             size = @adapter.add_to_queue(unique_keys_key, formatted)
diff --git a/lib/splitclient-rb/engine/common/impressions_manager.rb b/lib/splitclient-rb/engine/common/impressions_manager.rb
index 1cb4cda3..a4cfb208 100644
--- a/lib/splitclient-rb/engine/common/impressions_manager.rb
+++ b/lib/splitclient-rb/engine/common/impressions_manager.rb
@@ -30,7 +30,8 @@ def build_impression(matching_key, bucketing_key, split_name, treatment, params
               @unique_keys_tracker.track(split_name, matching_key)
             else # In OPTIMIZED mode we should track the total amount of evaluations and deduplicate the impressions.
               impression_data[:pt] = @impression_observer.test_and_set(impression_data)
-              @impression_counter.inc(split_name, impression_data[:m])
+
+              @impression_counter.inc(split_name, impression_data[:m]) unless impression_data[:pt].nil?
             end
           rescue StandardError => e
             @config.log_found_exception(__method__.to_s, e)
diff --git a/lib/splitclient-rb/split_config.rb b/lib/splitclient-rb/split_config.rb
index 22508cbd..4012d57e 100644
--- a/lib/splitclient-rb/split_config.rb
+++ b/lib/splitclient-rb/split_config.rb
@@ -310,23 +310,18 @@ def self.default_on_demand_fetch_max_retries
       10
     end
 
-    def self.default_impressions_mode
-      :optimized
-    end
-
     def init_impressions_mode(impressions_mode, adapter)
-      impressions_mode ||= SplitConfig.default_impressions_mode
-
-      return :debug if adapter == :redis
-
       case impressions_mode
+      when :optimized
+        return :optimized
+      when :none
+       return :none
       when :debug
         return :debug
-      # when :none  // we not support :none impression mode yet. Defaulting to :optimized mode
-      #  return :none
       else
-        @logger.error('You passed an invalid impressions_mode, impressions_mode should be one of the following values: :debug or :optimized. Defaulting to :optimized mode') unless impressions_mode == :optimized
-        return :optimized
+        default = adapter == :redis ? :debug : :optimized
+        @logger.error("You passed an invalid impressions_mode, impressions_mode should be one of the following values: :debug, :optimized or :none. Defaulting to #{default} mode")
+        return default
       end
     end
 
@@ -455,7 +450,7 @@ def self.default_connection_timeout
     end
 
     def self.default_features_refresh_rate
-      5
+      60
     end
 
     def self.default_segments_refresh_rate
diff --git a/lib/splitclient-rb/version.rb b/lib/splitclient-rb/version.rb
index 516fd124..88b820b4 100644
--- a/lib/splitclient-rb/version.rb
+++ b/lib/splitclient-rb/version.rb
@@ -1,3 +1,3 @@
 module SplitIoClient
-  VERSION = '8.0.1'
+  VERSION = '8.1.0'
 end
diff --git a/spec/cache/senders/impressions_sender_adapter_spec.rb b/spec/cache/senders/impressions_sender_adapter_spec.rb
index 5b7c9c11..03e99eca 100644
--- a/spec/cache/senders/impressions_sender_adapter_spec.rb
+++ b/spec/cache/senders/impressions_sender_adapter_spec.rb
@@ -22,10 +22,18 @@
       sender.record_uniques_key(uniques)
 
       result = config.cache_adapter.get_from_queue(unique_keys_key, 0)
-      expect(result.size).to eq(3)
-      expect(result[0]).to eq('{:f=>"feature-name-1", :k=>["key-1", "key-2", "key-3", "key-4"]}')
-      expect(result[1]).to eq('{:f=>"feature-name-2", :k=>["key-1", "key-2", "key-3", "key-4"]}')
-      expect(result[2]).to eq('{:f=>"feature-name-3", :k=>["key-1", "key-2", "key-3", "key-4"]}')
+
+      expect(result.size).to eq(1)
+      data = JSON.parse(result[0], symbolize_names: true)
+
+      expect(data[0][:f]).to eq('feature-name-1')
+      expect(data[0][:k].to_s).to eq('["key-1", "key-2", "key-3", "key-4"]')
+
+      expect(data[1][:f]).to eq('feature-name-2')
+      expect(data[1][:k].to_s).to eq('["key-1", "key-2", "key-3", "key-4"]')
+
+      expect(data[2][:f]).to eq('feature-name-3')
+      expect(data[2][:k].to_s).to eq('["key-1", "key-2", "key-3", "key-4"]')
     end
 
     it 'record_uniques_key when uniques is nil or empty' do
diff --git a/spec/engine/impressions/redis_unique_keys_tracker_spec.rb b/spec/engine/impressions/redis_unique_keys_tracker_spec.rb
index da307241..06e81d22 100644
--- a/spec/engine/impressions/redis_unique_keys_tracker_spec.rb
+++ b/spec/engine/impressions/redis_unique_keys_tracker_spec.rb
@@ -35,7 +35,13 @@
       expect(tracker.track("feature-test-#{i}", 'key_test-2')).to eq(true)
     end
 
-    expect(config.cache_adapter.get_from_queue(key, 0).size).to eq(20)
+    result = config.cache_adapter.get_from_queue(key, 0)
+    expect(result.size).to eq(10)
+
+    10.times do |i|
+      data = JSON.parse(result[i], symbolize_names: true)
+      expect(data.size).to eq(2)
+    end
 
     cache.clear
   end
@@ -56,7 +62,13 @@
 
     sleep 1
 
-    expect(config.cache_adapter.get_from_queue(key, 0).size).to eq(10)
+    result = config.cache_adapter.get_from_queue(key, 0)
+    expect(result.size).to eq(1)
+
+    10.times do |i|
+      data = JSON.parse(result[0], symbolize_names: true)
+      expect(data.size).to eq(10)
+    end
 
     cache.clear
   end
diff --git a/spec/integrations/dedupe_impression_spec.rb b/spec/integrations/dedupe_impression_spec.rb
index dfa61715..312b7c6d 100644
--- a/spec/integrations/dedupe_impression_spec.rb
+++ b/spec/integrations/dedupe_impression_spec.rb
@@ -98,8 +98,8 @@
       .with(
         body: {
           pf: [
-            { f: 'FACUNDO_TEST', m: time_frame, rc: 3 },
-            { f: 'Test_Save_1', m: time_frame, rc: 2 }
+            { f: 'FACUNDO_TEST', m: time_frame, rc: 1 },
+            { f: 'Test_Save_1', m: time_frame, rc: 1 }
           ]
         }.to_json
       )).to have_been_made
@@ -120,6 +120,7 @@
       client.get_treatments('admin', %w[FACUNDO_TEST MAURO_TEST Test_Save_1])
       client.get_treatments('maldo', %w[FACUNDO_TEST Test_Save_1])
       client.get_treatments('nico_test', %w[FACUNDO_TEST MAURO_TEST Test_Save_1])
+      client.get_treatments('nico_test', %w[FACUNDO_TEST MAURO_TEST Test_Save_1])
 
       time_frame = SplitIoClient::Engine::Common::ImpressionCounter.truncate_time_frame((Time.now.to_f * 1000.0).to_i)
 
@@ -130,9 +131,9 @@
       .with(
         body: {
           pf: [
-            { f: 'FACUNDO_TEST', m: time_frame, rc: 4 },
-            { f: 'MAURO_TEST', m: time_frame, rc: 3 },
-            { f: 'Test_Save_1', m: time_frame, rc: 4 }
+            { f: 'FACUNDO_TEST', m: time_frame, rc: 2 },
+            { f: 'MAURO_TEST', m: time_frame, rc: 2 },
+            { f: 'Test_Save_1', m: time_frame, rc: 2 }
           ]
         }.to_json
       )).to have_been_made
diff --git a/spec/splitclient/split_config_spec.rb b/spec/splitclient/split_config_spec.rb
index 8c5542fa..598587e8 100644
--- a/spec/splitclient/split_config_spec.rb
+++ b/spec/splitclient/split_config_spec.rb
@@ -54,7 +54,7 @@
 
       expect(configs.connection_timeout).to eq 5
       expect(configs.read_timeout).to eq 5
-      expect(configs.features_refresh_rate).to eq 5
+      expect(configs.features_refresh_rate).to eq 60
       expect(configs.segments_refresh_rate).to eq 60
       expect(configs.impressions_refresh_rate).to eq 300
       expect(configs.impressions_queue_size).to eq 5000
@@ -65,7 +65,7 @@
 
       expect(configs.connection_timeout).to eq 5
       expect(configs.read_timeout).to eq 5
-      expect(configs.features_refresh_rate).to eq 5
+      expect(configs.features_refresh_rate).to eq 60
       expect(configs.segments_refresh_rate).to eq 60
       expect(configs.impressions_refresh_rate).to eq 60
       expect(configs.impressions_queue_size).to eq 5000
@@ -113,6 +113,16 @@
       configs3 = SplitIoClient::SplitConfig.new(options3)
 
       expect(configs3.impressions_mode).to eq(:optimized)
+
+      options4 = { impressions_mode: :sarasa, cache_adapter: :redis }
+      configs4 = SplitIoClient::SplitConfig.new(options4)
+
+      expect(configs4.impressions_mode).to eq(:debug)
+
+      options5 = { impressions_mode: :optimized, cache_adapter: :redis }
+      configs5 = SplitIoClient::SplitConfig.new(options5)
+
+      expect(configs5.impressions_mode).to eq(:optimized)
     end
 
     it 'set impressions refresh rate with impressions optimized mode' do
diff --git a/spec/telemetry/synchronizer_spec.rb b/spec/telemetry/synchronizer_spec.rb
index 31c14281..48c5acfb 100644
--- a/spec/telemetry/synchronizer_spec.rb
+++ b/spec/telemetry/synchronizer_spec.rb
@@ -45,8 +45,8 @@
     let(:body_usage) { "{\"lS\":{\"sp\":111111222,\"se\":111111222,\"im\":111111222,\"ic\":111111222,\"ev\":111111222,\"te\":111111222,\"to\":111111222},\"mL\":{\"t\":[0,2,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ts\":[0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tc\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tcs\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tr\":[0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"mE\":{\"t\":2,\"ts\":1,\"tc\":1,\"tcs\":0,\"tr\":1},\"hE\":{\"sp\":{},\"se\":{\"400\":1},\"im\":{},\"ic\":{},\"ev\":{\"500\":2,\"501\":1},\"te\":{},\"to\":{}},\"hL\":{\"sp\":[0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"se\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"im\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ic\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ev\":[0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"te\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"to\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"tR\":1,\"aR\":1,\"iQ\":3,\"iDe\":1,\"iDr\":2,\"spC\":3,\"seC\":3,\"skC\":7,\"sL\":444555,\"eQ\":4,\"eD\":1,\"sE\":[{\"e\":50,\"d\":222222333,\"t\":222222333},{\"e\":70,\"d\":0,\"t\":222222333},{\"e\":70,\"d\":1,\"t\":222222333}],\"t\":[\"tag-1\",\"tag-2\"]}" }
     let(:empty_body_usage) { "{\"lS\":{\"sp\":0,\"se\":0,\"im\":0,\"ic\":0,\"ev\":0,\"te\":0,\"to\":0},\"mL\":{\"t\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ts\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tc\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tcs\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"tr\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"mE\":{\"t\":0,\"ts\":0,\"tc\":0,\"tcs\":0,\"tr\":0},\"hE\":{\"sp\":{},\"se\":{},\"im\":{},\"ic\":{},\"ev\":{},\"te\":{},\"to\":{}},\"hL\":{\"sp\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"se\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"im\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ic\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"ev\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"te\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],\"to\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]},\"tR\":0,\"aR\":0,\"iQ\":0,\"iDe\":0,\"iDr\":0,\"spC\":0,\"seC\":0,\"skC\":0,\"sL\":0,\"eQ\":0,\"eD\":0,\"sE\":[],\"t\":[]}" }    
     let(:body_custom_config)  { "{\"oM\":0,\"sE\":true,\"st\":\"memory\",\"rR\":{\"sp\":100,\"se\":110,\"im\":120,\"ev\":130,\"te\":140},\"iQ\":5000,\"eQ\":500,\"iM\":0,\"uO\":{\"s\":true,\"e\":true,\"a\":true,\"st\":false,\"t\":false},\"iL\":false,\"hP\":false,\"aF\":1,\"rF\":1,\"tR\":100,\"bT\":2,\"nR\":1,\"t\":[],\"i\":null}" }
-    let(:body_default_config) { "{\"oM\":0,\"sE\":true,\"st\":\"memory\",\"rR\":{\"sp\":5,\"se\":60,\"im\":300,\"ev\":60,\"te\":3600},\"iQ\":5000,\"eQ\":500,\"iM\":0,\"uO\":{\"s\":false,\"e\":false,\"a\":false,\"st\":false,\"t\":false},\"iL\":false,\"hP\":false,\"aF\":1,\"rF\":1,\"tR\":500,\"bT\":0,\"nR\":0,\"t\":[],\"i\":null}" }
-    let(:body_proxy_config)   { "{\"oM\":0,\"sE\":true,\"st\":\"memory\",\"rR\":{\"sp\":5,\"se\":60,\"im\":300,\"ev\":60,\"te\":3600},\"iQ\":5000,\"eQ\":500,\"iM\":0,\"uO\":{\"s\":false,\"e\":false,\"a\":false,\"st\":false,\"t\":false},\"iL\":false,\"hP\":true,\"aF\":1,\"rF\":1,\"tR\":500,\"bT\":0,\"nR\":0,\"t\":[],\"i\":null}" }
+    let(:body_default_config) { "{\"oM\":0,\"sE\":true,\"st\":\"memory\",\"rR\":{\"sp\":60,\"se\":60,\"im\":300,\"ev\":60,\"te\":3600},\"iQ\":5000,\"eQ\":500,\"iM\":0,\"uO\":{\"s\":false,\"e\":false,\"a\":false,\"st\":false,\"t\":false},\"iL\":false,\"hP\":false,\"aF\":1,\"rF\":1,\"tR\":500,\"bT\":0,\"nR\":0,\"t\":[],\"i\":null}" }
+    let(:body_proxy_config)   { "{\"oM\":0,\"sE\":true,\"st\":\"memory\",\"rR\":{\"sp\":60,\"se\":60,\"im\":300,\"ev\":60,\"te\":3600},\"iQ\":5000,\"eQ\":500,\"iM\":0,\"uO\":{\"s\":false,\"e\":false,\"a\":false,\"st\":false,\"t\":false},\"iL\":false,\"hP\":true,\"aF\":1,\"rF\":1,\"tR\":500,\"bT\":0,\"nR\":0,\"t\":[],\"i\":null}" }
 
     context 'synchronize_stats' do
       before do