I think facebook realizes that their uptake among younger audiences is way down and their userbase is aging. They've buttressed themselves so far via instagram,

I think facebook realizes that their uptake among younger audiences is way down and their userbase is aging. They've buttressed themselves so far via instagram, but I imagine they are maybe seeing a bit of the same trend. A generation seems to, more or less, engage with some social network and it becomes pretty sticky for them. So maybe this is just their 'next wave' play.