I think the invites feature is the only things bluesky really has. At this point, I don't mind as much as the feature allowed me to control who is in my feed and made my feed more intimate like the early days of Facebook. For me, it was a way to weirdly combat parasocial relationships by inviting people I know and talk to.
Theoretically. I can do the same for mastodon. But once I start trying to explain fediverse, they didn't care for it. Fediverse idea is interesting, but loses most people I want to keep in touch with.
The big thing is that it is invite only. Also, I find it easier to use than mastodon.
Another point, I need more shitpost in my feed. I fucked up with my mastodon feed and have too much political crap on there. I ended up saving a good amount of invites and invite only to small group people I like and want to keep touch with (no rando). So, I ended up with a small cohort of people over there that I can share thoughts and photos with.