As long as 1 relay exist who accepts you your data will persist and people anywhere can get it with their original username
That seems a little better than Lemmy, but the relays still hold too much power as you still have to go through someone else's relay or host your own (just like with Lemmy instances).
I wonder if there's a way to make it completely decentralized like Bitcoin so that it's on blockchain?
This instance is hard to discover by new users who otherwise may have joined because it's defederated from everything. We should come up with ideas to market it better.