@matsumuri PS. The "more messages on..." Message will happen everywhere. That's because Fediverse works by follow relationships on an instance basis.
For example, if someone makes a new account on mastodon.social, but nobody follows them from other instances, their posts would stay on mastodon.social and their replies would only federate to the person's instance that they're replying to.
Once one person on another instance follows that person, then all posts and replies would get sent to that seperate instance and that's for every single person on Fedi.
This doesn't take boosts into account and other things that only admins can do, that also help with federation.
So basically, no server sees EVERYTHING all the time. Hope that makes sense