Love that idea. Servers could distinguish if they want to be a general ‘home instance’ for users, and those that opt in could communicate with each other and push accounts around as necessary. Servers could calculate their likelihood to accept a new incoming account based on some heuristics the admin could set, with sensible defaults. That way the system would self-balance itself as new instances appear and as mature ones reach capacity. Of course for that to work there would have to be some central authority keeping track of account locations for login purposes.
Wasn’t Soylent Green algae based at first?