@FediGardenFedi.Garden ๐ฑ I feel like this is really easily solvable by just having the apps randomly cycle which server is selected by "default" when people are signing up. Obviously still give the option for people to manually select their preferred network, but by having the default random.
Just limit the random server selection to something like 10-20 reputable instances that have a track record of quality administration. That would avoid sending people to an instance that is unsupported and at a higher risk of shutting down.