Comscore released a list of the top 15 advertising networks based on their reach among U.S. internet users in December 2009.
The ranking showed that AOL Advertising remains the top ad network, reaching 187 million U.S. Internet users, or 91 percent of the total audience, followed by Yahoo! Network (180.9 million) and Google Ad Network...
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January 15 2010, 8:18am | Original Link »
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