The process of going public also provides a rare glimpse into internal stats previously kept private, with documents revealing the service has 845 million active users each month -- nearly half of which log in and actuate 2.7 billion likes and comments each day. The filing also sheds light on the company's balance sheet, with revenues of $777 million, $1.97 billion and $3.71 billion in 2009, 2010 and 2011, respectively. All told, it logged profits of $229 million and $606 million in those years -- earnings that were bested by the $1 billion it netted in 2011. The majority of its revenue comes from advertising, yet a sizable chunk (12 percent) of last year's figure comes courtesy of Zynga. All in all, that's enabled the company to stash away nearly $4 billion in cash -- a sizable nest egg for a company only eight years old. As for Zuck, his 2011 salary of $500,000 will be cut to $1 as of January 2013, but he'll be more than comfortable, thanks to that 28.4 percent stake in the company.