As part of a number of changes Valve made to the Steam Subscriber Agreement today, was a clause that requires users to clearly disclose if they are using a Steam service to promote a product, event or service in exchange for money, games or any reward.

“If you use Steam services (e.g. the Steam Curators’ Lists or the Steam Broadcasting service) to promote or endorse a product, service or event in return for any kind of consideration from a third party (including non-monetary rewards such as free games), you must clearly indicate the source of such consideration to your audience,” the subscriber agreement reads.

Last month, Valve asked developers to no longer offer free games to users in exchange for Steam Greenlight votes, stating it put the company in a “really uncomfortable position.”

(via Gamespot, Gamasutra)