I currently have my live rig set to stream to two services at the same time. (twitch.tv and youtube.com)
when I live stream it goes to both twitch and youtube at the same time and both chats are synced with each other so you can interact with both audiences!
If anyone wants help setting this up either shoot me a message or ask here and I will be glad to either type out a long "how-to" or create a video for it.
Cheers!