I have bought some games from resellers. I know they're bad, but sometimes I just really want to play that game online and the price is outrageous (a.k.a. I don't have the money at that time). Or in other cases I have bought an original game from steam, but the dlc's I want are not worth the money they're asking, which leads to me me using resellers again. For example I have bought cities skylines on steam, but most of it's dlc are from g2a, because they're selling the the game with 40% of it's functionality and other important shit is in overpriced dlc's