We don't know how much they earn now, but -"Jessica E. Vascellaro reported last week that a person familiar with the company said financials are strong and Facebook expects revenue in 2009 to increase at least 70% from last year. This person declined to say how much revenue Facebook is making but said the company has had positive earnings before interest, taxes, depreciation and amortization, or EBITDA, for the past five quarters and expects to be cash-flow positive in 2010."