I think what matters more, or perhaps at least in Valve’s perspective, is that microtransactions are inherently binding between the game’s developer/publisher and the player, so the game’s developer/publisher is the sole party held accountable here (by Valve), while ads inherently involve and invite a 3rd party advertiser, muddying the situation for everybody. While on the other hand, microtransactions can only be done for content already a part of the game, while ads serve content outside the scope of the game.
So this is much much more enforceable for Valve, while DLC and microtransactions marketing is already subject to the established rules on Steam.
I’m sorry but if I’ve already paid $60 for a video game, I shouldn’t also be required to make a friend just to be able to experience the entirety of the content this game offers, in the manner it was originally intended to be experienced.
Valve ban advertising-based business models on Steam, no forced adverts like in mobile games (www.gamingonlinux.com) angielski
Co-op campaigns are a rarity these days, and that should change (pdx.su) angielski