TL;DR: Valve has updated Steam's guidelines to ban games that force users to engage with in-game advertising, opposing the ad-driven model common in mobile games. Valve has continued its push to add ...

Valve has published a dedicated page advising developers on what type of advertising is and isn't allowed on Steam. "Steam does not contain any paid advertising, nor are models supported in games ...

Valve has updated its tournament operating requirements to explicitly prohibit any third-party tournament organizer from advertising sites that “violate Valve IP, or the terms of the Steam Subscriber ...