64% of Digital Ad Spend Controlled by 5 Companies(darrenherman.com)

1 pointsby amandalim8915 lat temu0 comments

64% of Digital Ad Spend Controlled by 5 Companies

http://www.darrenherman.com/2011/10/29/64-of-digital-ad-spend-controlled-by-5-companies/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hermanshead76+%28Darren+Herman+-+Official+Blog%29&utm_content=Google+Reader

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