Steam users must now disclose compensation for endorsements

Valve has added a new clause to its Steam Subscriber Agreement in which users now need to disclose whether they are being paid to promote a product on the service.

This applies to reviews, the Curator's List and when streaming a game using the new Steam Broadcast feature.

The promotion disclosure applies to monetary exchanges, a free game key or physical goods.

"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 new clause can be found in section 6 paragraph C.

Thanks: Gamasutra, Steam Database.