Y'know what, you're right, but in an ideal federated world, it is probably for the best if people branch out further than just the top 10 as well. The instance I'm on probably is not even within the top 50, but it's fast, performant, and has all my subscriptions. Not sure about the admins, but I also have alts on lemm.ee and sh.itjust.works in case this instance goes bust.