[graemep]

> like where their community is (Instagram, FB)

I loathe FB but use it for exactly that reason.

I even admin and moderate FB groups and it is a constant struggle against the system - but that is where the community is, I have no choice. Other admins do not like it either, but it is where all the related groups are, and people are nervous of relying on solutions from volunteers (e.g. me setting up an old fashioned forum).