To be honest, you're living on borrowed time. The only reason twitch would allow this is because it has flown under the radar so far. It's not a reasonable expectation that you can forever have a service that will let you stream copyrighted material to people.

If they are good or not, the laws exist. Once Twich is under Google's umbrella, they will be pressure by the content owners to enforce those copyrights. Maybe that's not happening today because Twich's community is smallish (compared to Youtube) but once they are "integrated" into the copyright notification/enforcement framework, end of story.