>>396534275
Mamamad has like 40 accounts. They only need one that can upload avatars to have all the visitor accounts use it. The user rank system and being able to join worlds are not related in VRC land; there's no filters to filter out visitor users (Which would be interesting but I can see why VRC doesn't want to do it, it'd make F+ even more insular). Also, mamamad literally would just desktop squat to grind accounts if they had to. Got less easy with EAC (since before you could boot VMs up kek)
To rejoin an instance all you needed was the instance ID from their API and you can rejoin on any number of accounts whenever. With new locked instances where it ACTUALLY CHECKS if you're friends with anyone in the instance they can't do this any more but if you unlock it it's the same as it was before.