well bs liberal fabrications are probably going to be less popular on a forum that's, on average, got a much more right-leaning libertarian active userbase
if anything, sites like this prove that there is an astounding market for bullstuff on the internet, and any ideology is equally likely to dip into that market. though i couldn't name any good sources for this off the top of my head as i involve don't myself in many liberal spaces that frequently discuss contentious politics