Most importantly, it doesn’t have an outgroup
It seems like there would be a large outgroup defined by little to no following (or other interaction) from this group, and a smaller but more well defined outgroup of those blocked by many or most people from this group. The same and similar ways to how we would define the [huge] outgroup of any clique today or pre-internet.
Thanks. I only recently discovered the “follow a bunch of strangers” interaction paradigm on Twitter. I don’t know that I’ll use your list, but I’m at least going to peruse it a bit.