Anonymous usage counter. Every time a Cloudflare challenge is solved via FlareSolverr, a single HTTPS GET is issued to the ping.txt asset attached to this release. The total number of challenges solved across all users equals the download_count of ping.txt (visible via the README badge).
The ping is gated by the usage_ping_enabled preference (default: on). To disable, uncheck "Anonymous usage counter" in the plugin settings.