IMHO the “Cambridge Analytica” thing is a trap. A very sinister one. It was already widely known that FB sells data. I have read articles about “Cambridge Analytica” already month ago when they bragged about it.
This is nothing new. This is what they use it for:
In Europe they still have privacy laws, much better ones than in the States. They now will push for a "privatization of data" which will be widely accepted and seen as a step into the right direction. All your data will be private, no one can sell them anymore.
BUT, what everybody is missing is that you will have to VOLUNTARY give access to ALL your data if you want to for example cross a border, get insurance, open a bank account, have internet access and so forth.
THIS is why the big corporations pushed for privatization of data in Davos...so they can fuck us better and harder.