Facebook may sell people's data.
Most of us may think Facebook earn money from adverts.
Personally I've tried adverts on quite a few sites for last several years, and my estimation is that you can earn money from adverts, that's true, based on ad "impression" and "click" ; however the income is as low as $1 for every 10000 impression.
Obviously to run an enterprise like Facebook you may really need a better source of money. In this case, for the hypothesis of data selling, I'm just wondering WHO would be the one interested in trading with facebook.
