Zuckerberg wants to monetize you
Well that is the new plan of FB. He wants to gather up all the info about people using FB, bundle it into graphs and charts and then sell the info to others. I admit that I don't have a FB account. I did initiate one but then got a lot of hooker names wanting to be my friend. While that interested me I decided it wasn't worth the spam.
So here's the "skinny" use FB and you throw out any right to privacy since Zuckerberg is going to sell your arse.