How big is Facebook? With nearly 400 million members on board, the company is a pretty big subset of the internet. With such a massive audience, the revenues from behavioral targeting, social gaming, partnerships can bring a lot of revenues. According to a study by Inside Facebook, the social network could have well made over $600 million in 2009 and can make close to $1.1 billion in 2010.

Estimates for 2009
Brand advertising : $225 million
Microsoft ads : $50 million
Virtual goods (Credits) : $10 million
Performance advertising : $350 million

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