"invalid if they change their name" What the fuck? Why would anyone care about that? Twitter's name change was so inconsequential that it didn't even stop people from calling it twitter.

Betting NO. Jack Dorsey (founder of Twitter, co-founder of Bluesky) quit Bluesky and endorsed X.

A more general version of this question:

"or change their name"

“an open decentralised standard for social media"

haha, no. there are several dozen versions of this same thing all competing for a tiny market of people. sure, musk might bankrupt twitter, but then this resolves N/A, so that's a nonissue apparently