Facebook was estimated to make over $500 million in the year of 2009. For the year of 2010, The Wall Street Journal is estimating that the social network will make $710 million in revenues based on user growth and consumer spending. The Wall Street Journal estimated the revenues using data from NYPPEX.
If Facebook ends up making $710 million in 2010, then it would be a 40% growth in 2009 revenues. As for LinkedIn, data from NYPPEX indicates that LinkedIn will bring in $200 million in 2010 revenues. In about four years, NYPPEX estimates that Facebook will make $1.9 billion, LinkedIn at $300 million, and Twitter at $283 million.