Who on earth would want to advertise on reddit, given the site’s thoroughly unpleasant audience, the notoriety of which has been growing by the month?
Reddit might be able to court the same sponsors (porn sites and such) that sustain the likes of 4chan, as long as said sponsors are willing to associate themselves with a far more misogynist, racist, child porn-defending audience. But this would likely inspire a revolt among redditors, who hold themselves in laughably high self-regard.