louis , 
The Mastodon developers started to implement telemetry for everything you search for: Posts, Accounts, Tags
https://github.com/glitch-soc/mastodon/commit/acc77c3836974473e7c6a423cbd1138479ae197a
I'm not so sure if I like what I see in this commit. But we all knew it would be coming eventually.
So important that we build Mastodon-compatible server alternatives.
