Cologne, Munich, 21 September 2011 – Thanks to its personalised nature, Payback has been a particularly effective and efficient form of customer marketing for over ten years, especially in the retail sector. With this expertise, the company has moved into digital marketing over the past few months to huge success. It is now due to make its debut at dmexco 2011 in Cologne where, as the European market leader in the couponing sector, it will showcase its services across all three relevant channels: offline, online and mobile. “For....