Getting people sorted into servers that are going to be able to handle the load, or even better getting them to host their own servers is going to be the way to go.

That part still worries me a smidge, and it's somewhat related to my other concern about funding/scaling. As more of the general public discover and move over, the % of the general population willing and able to host their own instance is going to steadily decrease. Not saying that we're all gonna die or anything, but it's going to be a shift and we'll have to continue to adapt.