https://techcrunch.com/2022/08/01/twitter-tests-a-tweets-per-month-counter/

Twitter is testing a feature that lets you see how many times a user tweets per month. Reverse engineers spotted this in development about a month ago, but as of this morning, some Twitter users have shared that they have gained access to this feature.

this new twitter feature where they tell you how many tweets you do per month is actually extremely rude imo pic.twitter.com/tNFIAuwinz