This article from TC confirms:
https://techcrunch.com/2022/12/15/elon-musk-suspends-mastodo...
Also I get journalists are feeling threatened, but it's a shame to see such a clear emotionally charged article from TC, I used to trust them for unbiased tech reporting.
> Twitter apparently suspended its open source competitor Mastodon from the service on Thursday afternoon. Just prior to its suspension, Mastodon (@joinmastodon) tweeted a link to the jet tracking account on its own service, according to archives.