I doubt it that it will be hard to believe that lots of users will abandon facebook based on this scandal! For some people facebook has become a part of their daily lives.
Okay, the did loose some money, but the stock are rising again! Just like all scams people will forget it, next week or month there will be another scam exposed and them people don't think about this one anymore!
The biggest treat for facebook are the blockchain like Steem. When more and more people will discover it and see that they will receive some rewards for their posts! If this happens, facebook has two options: go with the flow or pray that their community is stupid enough to stay!