It seems far more likely that Facebook will be directly regulated than Google; arguably this is already the case in Europe with the GDPR. What is worth noting, though, is that regulations like the GDPR entrench incumbents: protecting users from Facebook will, in all likelihood, lock in Facebook’s competitive position.
This episode is a perfect example: an unintended casualty of this weekend’s firestorm is the idea of data portability: I have argued that social networks like Facebook should make it trivial to export your network; it seems far more likely that most social networks will respond to this Cambridge Analytica scandal by locking down data even further. That may be good for privacy, but it’s not so good for competition. Everything is a trade-off.
Here is the link to the longer piece, to get them regularly you have to pay, definitely recommended, now more than ever.