Mastercard, Visa To Help Target Ads

New submitter ThatsMyNick writes "The two largest credit-card networks, Visa Inc. and MasterCard Inc., are pushing into a new business: using what they know about people's credit-card purchases for targeting them with ads online. 'A MasterCard document obtained by the Journal outlines some of the company's plans, which included linking Web users with purchases. According to document, the credit card provider said it believes "you are what you buy." ... Visa is planning a similar service, which would aggregate its customers' purchase history into segments, including location, to make ads more effective at appealing to people in a respective area.'"