A spectating system that leverages game metadata and/or broadcast metadata to provide rewards to or otherwise acknowledge participants in broadcasts. The system may analyze the metadata to detect events or other information about broadcasts, and may recognize and/or reward participants based at least in part on the analysis. Spectators may be rewarded for participating in broadcasts, or in particular events in broadcasts. Broadcasters may be rewarded for in-game achievements or for achieving levels of audience participation or support. Participants may select or vote on other participants to receive rewards. Rewards may, for example, include acknowledgement of participants via the user interface, virtual items such as in-game virtual gear, physical items such as game-related merchandise, and granting of benefits or privileges by the spectating system and/or game system such as special content for a broadcaster's channel.