I suspect the audience of people who really like Cards Against Humanity leans towards people who like being "politically incorrect", because the card game often inspires people to be incredibly offensive. It seems likely that their audience includes lots of 4channers, shitlords, extremists, racists, or any other group of people known to be generally offensive.

By making moves like this, they're showing everyone else that they aren't actually so bad - which is an interesting business decision. So maybe if you're a really sensitive person, you see this kind of thing they do with their money, and don't feel too bad about buying or playing an offensive game.