@mastohost Yes you are right I didn't see that sorry.
I guess the question is that on Mastodon (and fedi in general?) having 1 person that is very famous across servers is heavier that having maybe even hundreds of people that only communicate in-server. And that's hard to communicate and price, right?
But I guess single-user instances should have a different pricing model because you know a priori they will want to federate a lot?