Facebook was launched by Harward student Mark Zuckerberg and his roommates in Febuary 2004, but it didn’t turn a profit until late 2009.

Many people did not know that why Facebook is free to use. So, how Facebook is able to provide funding to serve its huge growing networks with over more than 500 million users? Actually, there are many amazing businesses behind the scenes of this company.

Facebook actually earned a lot of money and also created many new profitable industries that benefits itself and also for other people. Some industry sources claimed that Facebook made between $600- $700 million in 2009, the incomes are from brand advertising, Microsoft advertising, Facebook credits and performance advertising.

In July 2010, Facebook teamed with Amazon to provide shoppers with purchase recommendations and upcoming birthday reminders so that a user can purchase gifts through Amazon website and send to friends with birthday.

Currently, the value of Facebook is more than $20 billion.

The infographic here via skitzone provides more information on interesting facts and rumors about Facebook.