Used games indirectly send money to game devs.<p>I'm not going to spend £30 on a game and just hope it's okay. But I might risk it if I know I can sell the game to someone else.<p>Bob might not have enough money to spend £30 on a new game, unless he sells some of his old games to someone else.<p>Ann buys secondhand games, but she also spends a lot on DLC.