New York State's Attorney General, Andrew Cuomo, has subpoenaed a number of online retailers, including GameStop, Barnes & Noble, Ticketmaster and Staples, over the way they pass information to marketing firms while processing transactions. MSNBC explains the scenario thus: "You're on the site of a well-known retailer and you make a purchase. As soon as you complete the transaction a pop-up window appears. It offers a discount on your next purchase. Click on the ad and you are automatically redirected to another company's site where you are signed up for a buying club, travel club or credit card protection service. The yearly cost is usually $100 to $145. Here's where things really get smarmy. Even though you did not give that second company any account information, they will bill the credit or debit card number you used to make the original purchase. You didn't have to provide your account number because the 'trusted' retailer gave it to them for a cut of the action." While there is no law preventing this sort of behavior, Cuomo hopes the investigation will pressure these companies to change their ways, or at least inform customers when their information might be shared.