I’d be pretty surprised if people like Cory Doctorow aren’t on here, but most celebrities engage for a reason (eg to be seen and maintain their brand). It’s happening somewhat on Mastodon and on Threads, but even on Reddit it was limited to the occasional AMA for the most part. If people were participating, they were mostly using aliases.

I don’t think we have enough organic users yet to make an AMA kind of thing happen regularly with random celebs, and I suspect most of them aren’t yet drawn to the content and format we have so far.