Last Year’s Top 3 U.S. Search Marketing Agencies Continue To Lead In 2013 Report

Every year, Ad Age ranks the top performing U.S. search marketing agencies based on the previous year’s U.S. and worldwide revenue. This year, the top three agencies held their 2012 report rankings, with iCrossing, 360i and iProspect coming in at No. 1, 2, and 3 on the list of largest U.S….

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