 New purchases of the game are provided with a one-time use card granting access code that unlocks the game's Cerberus Network, an online downloadable content and news service that enables bonus content for the game. However, users who bought the game used would have to pay for the Cerberus Network separately if they wanted access to the new content. This policy allows publishers to combat the used-game market; companies like GameStop have allowed costumers to sell used games back to the retailer so that the company can resell them at a small discount to other customers, but the publisher does not make a profit. BioWare online development director Fernando Melo revealed that 11 % of all Mass Effect 2's downloadable content revenue came from the Cerberus Network. The policy attracted criticism from some of the fan community, who have criticized downloadable content as being overpriced and an incentive for developers to leave items out of the initial release.
