I was discussing this with other lemmings on matrix and it seems there is not much help if you dont have a community to build on your own instance. Now if you do host for yourself then you can federate with other instances to subscribe and pull from their communities which does reduce the total load on those services but that is about it.

Communities are going to Win/Loose based on personalities and critical mass, and the people hosting those communities will just have to increase their hosting needs.