I wouldn't be surprised, but also I'm not sure if this is good enough evidence.
Jx is a really short string, it is probably used as a signature by dozens or hundreds of women.
The broadway thing could also have been arranged through some other channel, I'm sure epstein had plenty of connections there outside of rowling.
She's a PoS as it is, no need to drag near-conspiracy theories into it. Same reason why it's counterproductive to dig up wild stories about trump from the files, he's a pedo piece of shit but those stories are clearly and obviously made up and discredit everyone who brings them up.
The benefit of the fediverse is that it's trivially "forkable". If lemmy.world and other big instances get overwhelmed with bullshit, I fully expect that many smaller chill/focused instances will defederate and keep on doing their own things, chatting only with each other - no need to jump any ships. Perhaps there would also be some in-between, instances which are federated with both worlds, and where you can get a combination of tons of niche information/entertainment but with bots, and a small amount of genuine human interaction. I hope if that ever happens, lemmy-the-software gets sorting algorithms to deal with these situations.