

I don’t know about the “tens of thousands of servers” in the Fediverse. For now, it’s pretty easy to keep an overview. I also do not think the number of servers will scale linearly with the user base. Most people may choose a server randomly, but after a while in the Fediverse you will find your instance. Take feddit.org as an example - they have a charitable organization behind then, the “Fediverse foundation”. People like that instance because of the terms it operates under, and they do their thing. Server admins are not necessarily random people, and I don’t think coordination happens via hash tags.
True, I was looking from the perspective of lemmy. But I think that’s fair, as the fediverse is not as federated as it pretends to be. For Lemmy it’s about 1,000 servers. I guess many of them are singles person instances, but that comes from my subjective feeling and can be bullshit ;)