It depends on the mode. They can choose the time, but then get awful poor ad-revenue. Or they take the juicy contract, and are forced to let twitch decide when

It depends on the mode. They can choose the time, but then get awful poor ad-revenue. Or they take the juicy contract, and are forced to let twitch decide when ads are rolling. And with gaming content, even choosing the time is not always flowing well with your content.