Valve has introduced a controversial addition to its digital game distribution service, Steam.

Steam now allows game modders to sign up for a free account, and upload their mod and monetize it.

Yes, you can now sell mods on Steam. And users who already bought a game must cough up some eextra bucks just to install those mods.

The paid mods are now available for just one game, Elder Scrolls V: Skyrim. Steam could open doors for paid mods to other games soon.

Valve is giving users a 24 hour refund period, during which they can decide to keep the mod or return it for their money.

Steam is apparently offering modders 25% of the revenue from their [...]