This is the account Elon said previously he wouldn't ban, then did and so banned Mastodon because they mentioned it - educated guess here.
https://www.theguardian.com/technology/2022/dec/14/twitter-elon-musk-private-jet-account-suspended
“Any account doxxing real-time location info of anyone will be suspended, as it is a physical safety violation. This includes posting links to sites with real-time location info. Posting locations someone traveled to on a slightly delayed basis isn’t a safety problem, so is ok.”
Yesterday it was public ADS-B data because it's considered "doxxing" (Later on posting a license plate asking for people to identify it 🙄)
Today it's banning any other platforms from having an account on Twitter. I wonder which part of the policy he's created (in his shallow egotistical mind) for this to be allowed.
Free speech eh?
@gamingonlinux and I have banned the blue bird from my live
Mastodon is a such more friendly site 
@aus_der_UBahn @gamingonlinux No, this is new, the last archive prior to today has it unsuspended https://web.archive.org/web/20221211201332/https://twitter.com/joinmastodon
The domain thing is something else.
Mastodon is the largest decentralized social network on the internet. Built on open web standards by a non-profit. Learn more on our website!
“Did you know? You can follow @ElonJet on Mastodon over at https://t.co/r6TBUTJRf4 ✈️”
“Did you know? You can follow @ElonJet on Mastodon over at https://t.co/r6TBUTJRf4 ✈️”
@gamingonlinux Nothing that this pathetic narcissistic loser does surprises or shocks me any more ...
Mastodon is the largest decentralized social network on the internet. Built on open web standards by a non-profit. Learn more on our website!