We explore news providers' quality choice when they compete on a social network (platform) that strategically sets the design of its `newsfeed’ (content-mix presented to members). Consumers divide their time between the platform and news sites depending on their relative preferences for `user-generated content' and news. In equilibrium, the platform always shows news. In a broad range of scenarios, including the possibility for newspapers to opt-out, customized newsfeed or whether or not newspapers face competition, we show that newspapers are worse off under content bundling by the platform. We also show that there are strong forces for quality to decrease.