Twitter must be bleeding users hard right now as they are banning *ALL* promotion of rival social networks, not just Mastodon (& various forks like #CoSo too) now.
https://twitter.com/twittersupport/status/1604531261791522817
It’s not just links too. Just saying “follow me at counter social, my user handle is @Darnell over there” is also a violation. So are “link aggregators” too.
https://help.twitter.com/rules-and-policies/social-platforms-policy