The Steam Workshop has always been a great place for sharing mods, maps, and all kinds of items that you’ve created. Now it's also a great place for selling those creations. With a new, streamlined process for listing and selling your creations, the Steam Workshop now supports buying mods directly from the Workshop, to be immediately usable in game. Discover the best new mods for your game and enable the creators to continue making new items and experiences.
They’re also offering a 24 hour refund period on purchased mods.
Update : There are many downsides to this program, for both content creators and players, being discussed in the thread below.
