Steam is the largest platform for buying PC games, so you have the widest selection of games. We understand it is also comfortable to have your games in one place, easy to start whenever you have free time to play. However, if you want to support the developer then you could buy the steam keys on our website. All future updates, add-ons and new features, bonuses will be added to the Steam version as well, so there will be no difference between the two types.