What Facebook is doing?

Have you ever play any Facebook games? I would say the founder of Facebook decided to open the platform for anyone to design different interactive games for users. It was a really smart move.

'FarmVille', 'Hotel City'  'The Pet' etc one of those you might be playing in your daily life. Apart from keeping users interested by all different games, Facebook can also obtain people's personal informaion , such as the date of birth and their interests.

When you are play games on Facebook, you are being marketed withour your knowledge.