Facebook is trying get in the market of successful concepts like Flipboard and Pulse. Why wouldn't Facebook like to mine what people (and their 'Friends') 'like

Facebook is trying get in the market of successful concepts like Flipboard and Pulse. Why wouldn't Facebook like to mine what people (and their 'Friends') 'like' and show them relevant news when Flipboard and Pulse connect to your Facebook, churn what you shared in the past and show you news which you might like.