Twitter formalizes blocking of accounts and tweets that encourage readers to follow you on other social media sites, including Mastodon.

Specific examples of violating tweets given in the policy:

> “follow me @username on Instagram”

> “[email protected]

https://help.twitter.com/en/rules-and-policies/social-platforms-policy

Promotion of Alternative Social Platforms Policy | Twitter Help

@Pwnallthethings @username So uh... when are they banning the official Facebook and Instagram accounts on Twitter? 🤔

(Or is this just an obvious attempt to ban Mastodon without looking like they're banning Mastodon?)

@bobcgames @Pwnallthethings @username yet another sign the policy was crafted on a whim and is equally likely to bounce erratically in a day or two
@bobcgames @Pwnallthethings pleasantly unsurprised to see that prediction come true?