Twitter will remove accounts made to "promote other social platforms" and content that has links or usernames to Facebook, Mastodon, and others (@twittersupport)
https://twitter.com/twittersupport/status/1604531261791522817
http://www.techmeme.com/221218/p5#a221218p5
Future post from 2023: When #Mastodon URLs were first blocked by the `hardcore` team using coarse regular expressions, it only served to accelerate the #Fediverse algal bloom of various polymorphic self-hosted URLs fronted by globally resilient CDNs. https://www.techmeme.com/221215/p45#a221215p45
Techmeme
jay