I guess that for Valve, Steam Direct will give another advantage: a way of promoting Source 2. When they will release the SDK, probably the fee for releasing a Source 2 game will be lower than if you build your game with Unreal.
I guess that for Valve, Steam Direct will give another advantage: a way of promoting Source 2. When they will release the SDK, probably the fee for releasing a Source 2 game will be lower than if you build your game with Unreal.