The game's already on Steam.
It gets promotionals from Steam.
Three rings doesn't like to do jack diddily.
A lot of players are ready and willing to do something to create content for this game (Monsters, level creators, weapons, etc.)
Three rings doesn't do anything.
Items are created for the game.
We'd (probably) get something for doing this. (X amount of CE for Y creations or something. Maybe a 3 UV of any X items of our choosing or something.)
They make money because new content (or ce crafts)
We get new content.
Everyone wins.
I would partake in such a thing, most likely. And why would they pay us? Our items being featured should be enough.