Gamestop has added Impulse to its website, after acquiring the service back in March. In order to start using it, you just need to download the client. Gamedtop gift cards, gift certificates or credit earned through the Edge Card are not being accepted as of yet. The firm has said it expects these payment options to be “available in the future.” The firm has said in the past it expects to generate $1.5 billion in digital revenue by 2014. Thanks, IndustryGamers.