@petros There certainly were (last I checked) quite a bit of right-wing people (including extremes, hence the dogwhistling) there, but also many left-wing. And IIRC the pun you mention was mostly used by rightists wanting to break off because they perceived the community as too progressive.

Another angle is that it was a place of actual discussion of ideas from all areas. As much as I'm dubious full, unconstrained free speech is the correct approach for big societies, places where you can try actually persuade people you disagree with whatever their ideology are IMO useful. Especially since the quality of debate was at least high enough that populist right-wingers didn't get the usual bonus of using "common sense" arguments.