I will say as someone has an invite: you're not missing out on anything. It definitely has far less activity than either Twitter or Threads, but somehow it also just has worse content. You would think they were invite-only to keep the quality high, but everything is either furry porn or hate-filled rage bait, neither of which I am personally a fan of at all. I keep telling trying to tell it as much, but I honestly don't think I've seen one post I truly wanted to see. I tried to do it for like a week hoping it would get better, but honestly it seems like there's just nothing worthwhile on the whole site. Personally, the only way I can see me ever using Bluesky is if they manage to totally invert their userbase. You need to just start over when you somehow get a crowd worse than either version of Twitter, in my opinion.