Twitch announced it is partnering with several developers to sell games directly to players through streams. Viewers will be given an option to purchase a game through a button below the video on the channel page if the game or in-game content is available on Twitch.
In addition, if the streamer is a partner who has opted into the program then he or she will get 5% share of the revenue. The implementing this as an alternate way for viewers to show support for their favorite streamers.
The new program is set to launch "sometime in the spring of 2017".