“ There is a SECULAR shift from display ads (paid on CPM basis) to search ads (paid on CPC basis)... (read full comment) ” 

Posted on May 24, 2012 at 11:02 AM EDT

“ openness: next step in the evolution of social networks great article. And it points to a necessary next step in the evolution of social networks... (read full comment) ” 

Posted on August 23, 2009 at 6:58 PM EDT

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