Another point is even if Cambridge Analytica didn't exist, Facebook itself would and are doing the same things themselves, although not over a 50M population radius but over a billion. With a budget to match.
Let us please remember that these incidents are not specific to Facebook, rather they are systemic to the big five.
A couple of years or more I was posting on Facebook regarding Cambridge Analytica's practices and was considered a tin foil hat and crazy.
No the reason I was able to shed some light at the time was I knew exactly how we could utilize the Facebook API back then to elicit the kind of data we are talking about, and completely legally. Nobody needed to circumvent FB API policies, it was yours for the taking.
I didn't do it although I did put together multiple PoC's from 2011 to 2014 to see what was possible and it was bad.
Another thing we should remember is that Cambridge Analytica is just one small tip of a fractal iceberg whose body is Facebook and the big five, your internet connection and certainly your smartphone themselves.
Google, Apple and Amazon are no less culpable in this regard.
The question now becomes which side of history we want to be on.
Another question is we assume we want to take our privacy back and how we do that with consent and assurance.
I don't have a Facebook account anymore but I'm still tracked as we all are. My mother doesn't like me not being there but a small price to pay. I can contact her elsewhere and do.
Surely enough is enough?
I think it is time to look for broad scale technologies that are better both in the real world and in our private world.
Specifically it isn't necessarily about advertisers it regards surveillance.
Advertising revenue can be completely offset by Governmental tracking.
As I said in the other post we can't prove the positive but it certainly is a feasible option.
I know I could do it given the charter.