Earlier quoted context omitted.
Just checked out Mastodon and I didn't feel compelled to sign up. I am sure it is fine but the network effect is lacking, it is not as if I need to go on there for any reason, don't know anyone on there. What I was surprised at was that there was no blockchain nonsense going on with it, lurking away in the footer. That really would have turned me off it.
Unless I'm mistaken, I think Mastodon predates the recent blockchain fad.
Mastodon itself has no reliance on blockchain.