Bitch@ us like IRC. It's familiar. At least to old dudes like me that grew up on IRC in the 90s. Maybe Zoomers will like it because it's retro or new to them.
Discussion
'old internet' has an appeal to both young and old.
Not that anyone listens to me, but bitchat forum (styles as message boards of old) fork would potentially be very popular too. Imo imo imo
Also what is like irc now.
Nostr-as-microblogging is like farcaster, is like twitter, is like Bluesky is like etc etc etc. not much novelty aspect to that, not a very 'shareable down the pub' conversation point here
Bitchat (afaik) has no marketing beyond jack's tweets (you could pretty much say the same for nostrmicroblogs). But it is probably getting a lot word of mouth promotion.