I think Google realized this a long time ago and it's also part of why they failed with Google plus. They just weren't willing to go down into the gutter the way Facebook is and try to suck up people's time to a ridiculous extent. They have remained too concerned, if you will, with providing actual value and Facebook, from day one, has never had that as a concern as their only concern is getting you to use the app as much as humanly possible.