$150/month is a lot of money, but split just 100 ways, that's $1.50/month. If the user base is too expensive, emotionally, to do free server administration for, well, why would you want to do that job then at all? Which speaks volumes.

It's the payment onboarding that's usually the sticking point (which is fortunate for my side of the discussion, because you've missed a zero), but that also misses that hosting costs will almost certainly scale with user-count.

And I'm not discussing emotionally-heavy, but public standing within the community you've convinced to trust you with their social media algorithm