Subscriptions: include Publicize numbers in follower count

[jeherve]

On WordPress.com, we include the number of Facebook and Twitter followers in the subscriber counts. in Jetpack, we don't.
It'd be nice if both services behaved the same way.

Suggested in 1883051-t

[kraftbj]

Another request in http://wordpress.org/support/topic/publicize-not-showing-my-facebook-and-twitter-followers?replies=1

This has been a repeatedly requested feature, especially by WPCOM->Jetpack users who were surprised by the sharp difference in reported numbers.

[richardmtl]

Another request in 2092656-t

[jenhooks]

Another request here: 2110200-t

[jeherve]

Also suggested here:
https://wordpress.org/support/topic/jetpack-publicize-7?replies=1&view=all