If your a twitch affiliate you can’t stream on multiple platforms at the same time you will get banned .... this should be common sense but I see so many streamers doing this it’s not funny 
Solely for any live audio-visual work you choose to provide to us as User Content (your “Live Twitch Content”), starting from beginning of the Initial Broadcast of any such Live Twitch Content, and continuing for a period of twenty-four (24) hours following the end of the Initial