A better example would be discord where you part of starcraft server, banned from blueskye server, part of foss App XYZ server etc
Discussion
isnt discord just an app
Yes.
Probably a confused point from me.
The whole design premise is that discord is centered on server (analgous to relay lists today on mostr apps nostr) selection.
Yahoo mail is an app that sends and receives on the email protocol, where yahoo users dont have to think about the existence of their or their counterparties email servers. This is analogous to the outbox it just works model.