A lot of their messaging to advertisers revolves around discussing the value proposition of subs like /r/buyitforlife which has 1.5 million users who are likely actively considering a purchase at the moment of viewership, are willing to be convinced to spend more money, and are relatively affluent. Klaje (Reddit’s rev executive) loves talking about trust and positivity of the user base. I’m not sure how that messaging survives if the site moves away from quality content.