Peter Klein of MediaWhiz discusses building sustainable partnerships in the performance marketing space and why many networks are failing. AS you may know, MediaWhiz was bought by Matomy Media Group in January and the company has gone through substantial changes. MediaWhiz’s success in the online performance marketing and digital media space is well recognized. It ranks as the No. 2 cost-per-acquisition network by mThink / Revenue Performance magazine. The 2012 Advertising Age Agency Report ranked MediaWhiz as the No. 11 search marketing agency and the No. 21 digital-agency network in the U.S.