All the worst suspicions about how your Facebook data can be used, confirmed. PLEASE, stop doing quizzes, surveys, questionnaires and anything where you have to click OK on permissions! This gives access to your profile AND often your friend's profiles, to 3rd parties! (It's also how you get hacked).
“We exploited Facebook to harvest millions of people’s profiles. And built models to exploit what we knew about them and target their inner demons. That was the basis the entire company was built on.”
https://www.theguardian.com/news/2018/mar/17/cambridge-analytica-facebook-influence-us-election
