I’m gonna echo what others have said here. The mastodon signup process is too complex, and searching for instructions just leads to “what is the fediverse and/or activitypub” explainers.
I created a mastodon account a few years ago and it was my first introduction to the fediverse. It was frustrating and I only persevered because I REALLY wanted to replace twitter.
Once I got it set up, I realized that no one who I followed on twitter was there. My feed is currently like 2 people, plus a bunch of dead accounts from people who dipped their toe in but didn’t stay.
Joining Bluesky was simple, and there were already a bunch of accounts I wanted to follow. The recent influx has increased that, and it feels a lot like old school twitter without the nazis.
People originally joined twitter (and stuck with it for so long) because that’s where everyone else is. Mastadon is too clunky join and use, so people aren’t.
Same here, which is why my Bluesky feed is much better. Everyone wants to be where everyone else is (that isn’t X), and it seems like that’s Bluesky.