I know I am probably late to the facebook drama, but I think taking out of this all is just how genius and evil all those collector companies are.

I would have probably never thought of collecting data off of mechanical turks and quick jobbers, but they did not only think of it, they deployed their system across multiple jobs, scanning more and more data in from all those connected logins, for less than a dollar per profile, which generates atleast 300 profiles on average.

The real question is why is it allowed for a third party app to actually access all that? even if there's a permission for that, why would such exist?

I really can't see why any application would need access to likes, shares, all friends, all their profiles etc.