https://www.rawstory.com/2018/09/heres-unique-behavioral-psychological-profile-used-manipulate/
Kosinski : “If I know 70 of your likes on Facebook, that’s enough to outdo what your friends know about you. If I know 150 likes that you clicked on Facebook, I know you better than your parents know you.” And at 300 likes, Kosinski intimated, the algorithm knows you better than you know yourself.