Yeah. Same. I moved to Mastodon, and then ended up getting my invite to Bluesky (two weeks before it opened to everyone...thanks Jack Dorsey...real helpful...). But no one is there. Mastodon has mostly tech and open source. Bluesky is...well...nothing that I can tell.
Unquestionably the winner of Twitter's fall was TikTok, when suddenly everyone including politicians started making accounts/posts. Which is likely a large part of the push to get it banned in the US. Because it's taking away users/advertisers from good ol' 'murican tech businesses owned by south african diamond mine nepo babies.