The other thing that I don’t quite get about it is, you can come across the “fragmented communities” either through random chance or consciously seeking them out, and just subscribe to them. Now you can participate in multiple communities from your home instance.

I get people are lazy and just want to have the stuff they like shoved in their face, but IMHO you get a much better result when you have to put a little skin in the game.

It also discourages some level of shitposting because shitposters have to work just as hard to find the places to make their dumb jokes and in my experience most of those types are not going out of their way to do that.