https://arstechnica.com/gadgets/2022/12/mastodon-highlights-pros-and-cons-of-moving-beyond-big-tech-gatekeepers/

As Elon Musk's Category 5 tweetstorm continues, the once-obscure Mastodon social network has been gaining over 1,000 new refugees per hour, every hour, bringing its user count to about eight million.

Joining as a user is pretty easy. More than enough ex-Twitterers are happy finding a Mastodon instance via joinmastodon.org, getting a list of handles for their Twitter friends via Movetodon, and carrying on as before.