Perhaps you misundstand. The ones with <10 users cost a few bucks a month. The ones with thousands of users are sustainable through donations. There is no lack

Perhaps you misundstand. The ones with <10 users cost a few bucks a month. The ones with thousands of users are sustainable through donations. There is no lack of sustainability here. Because it's a federated system, there is no need for instances larger than that (and in my opinion, they are a net negative for the network).