It linked directly to ElonJet's account there and invited people to join and follow this account. That's probably what did it.
https://web.archive.org/web/20221215174053/https://twitter.c...
https://web.archive.org/web/20221215174053/https://twitter.c...
> Uh oh — ban in 3... 2... :grimace:
https://mobile.twitter.com/TexasObserver/status/160354905128...