It's not based on blockchain, same situation of IPFS. Look at this other part of the thread:
https://qoto.org/@post/109965516109644382
Anyway I believed in the Fediverse before Mastodon was a thing but now I admit it's a total disaster and I would like that others were honest enough to recognize the fundamental problem.
I don't want to support anymore the mafia scheme by some large Fediberse instances and the silence of the other ones.