On a loosely related note, LinkedIn told Silicon Alley Insider that its earning $75 CPMs (cost paid per thousand viewers) for advertising in the US and $50 CPMs in the U.K. Now, LinkedIn certainly has a more targeted and potentially valuable audience than Facebook and MySpace but those CPM numbers sound really high. Still its a sign that niche networks with more focused audiences matter. LinkedIn has 17 million users in comparison to Facebook's 70 million and MySpace's 200 million. CPMs on Facebook and MySpace are much lower.
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