20% of Online Advertising is on Social Networks

More than one in five of all online ads are served on social networks. MySpace still leads the pack with 9.2% of all online ads, and Facebook is a close second with 8.2%. The 3.7% of online ads served on social networks is split among such sites as Tagged.com, MocoSpace.com, Hi5.com, Bebo, Classmates.com and other smaller sites, most with 0.1% or less of the total online ad market: Top Online Display Ad Publishers in Social...
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