Nostr attracted Bitcoiners also maybe partly because it was promoted, mentioned by other big follower account Bitcoiners. Most Bitcoiners seem to have a limited reach of influence (as far as I can tell). Which is why nostr is spoken about and known on bitcointwitter, but almost totally unknown and never mentioned on wider twitter.
True - definitely had an impact. I’d also argue the MSM had an impact too. BlueSky garnered significant MSM coverage post Elon Twitter acquisition and it’s easier to use for those used to usernames and passwords.