Facebook Is Done Giving Its Precious Social Graph To Competitors

Of all Facebook's data sets, it's the social graph that's truly unique. It's spent nine years getting you to confirm who you know, and apparently it's sick of handing over your friend list to competitors. This week it cut off both Twitter's new photo app Vine and messaging app Voxer from Find Friends, Facebook's API that lets you connect with Facebook friends on other apps. But this could backfire