Point your eyeballs at what Valve is up to with Steam: It’s apparently trying to bar developers from using Steam to advertise, for example, their entry on the Epic Games Store, but the new policy actually seems to include much more than that.
“In the game you ship via Steam, and in communications on Steam, you may only promote the Steam version and its availability via Steam, and not other distribution outlets. This applies both to full versions of your game and to content patches that change the existing version.”
Of course, as MMO Fallout points out, Valve is so incredibly lax about enforcement of most of its policies that it’s likely this will be used only when Valve needs to crack down on a frenemy.
Source: Valve
