i'm not gonna pretend like /pol/ isn't an echo chamber. reddit is a super echo chamber though, and the reason why it is more of an echo chamber is because of the updooting. a bunch of perpetually online people create the impression of a broad consensus. even though even the most popular posts only get like 10-30k updoots. once they shut /r/the_donald out, they effectively sealed themselves inside their echo chamber. great if they want to control what people think... not so much if they want to actually know what everyone else is thinking too. at least on /pol/, everyone has a voice, whether that's pro-trump, anti-trump, or "niggers tongue my anus, jannies clean it up." i love this place.
United States