GamesRadar: "You'd think that Steam Trading Cards are harmless. It's a relatively simple idea: play a participating game on Steam, and within a few hours, a series of four or five trading cards (usually out of a total of eight) will drop at random intervals. Since you can't get all the cards yourself, you'll need to trade with friends or buy them on the Steam Market to complete the set. Once you have all a game's cards, you can craft a badge, which will compensate you a random emoticon and background related to the game. What could be so bad about that? Plenty, if you're a small indie developer that takes pride in their work."