Two things going on that may be related:
1) Mastodon new user count is up to about 1000 per hour for the last day. This is way up from the recent low hundreds.
2) Reddit r/Twitter is full of complaints that Twitter feeds are now not showing followed accounts, replaced by right wing politics and even porn.
Getting tweets… from people that i dont follow and dont know at all >>> https://www.reddit.com/r/Twitter/comments/11stqha/getting_tweets_on_the_timeline_from_people_that_i/
Did twitter change its algorithm completely? >>> https://www.reddit.com/r/Twitter/comments/11suqxl/did_twitter_change_its_algorithm_completely_no/