Facebook employs only around 3,000 staff, giving it an average revenue of $ 1.2 million per person in 2011.
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There are on average 3.74 degrees of separation between any one Facebook user and another. [Misreported claims of 4.74 degrees of separation confused the number of degrees with the distance - or hops - between each of the people on the friendship chain. ‘Degree of separation’ is the same as ‘distance minus one’.]
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U.S. consumers spent 15% of their online time at Facebook in September 2011 - but Facebook is expected to capture just 6.4% of total online ad spending this year.
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According to Facebook, people who visit its network via mobile devices are twice as active on it as those who tap into it via other means.
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The number of tweets per day now (in Oct 2011) exceeds 230 million, up more than 100% from the beginning of the year.
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