yeah, people have streamed it before, without considering the rules of it. a streamer earlier talked with a staff member of twitch over the phone and was told that it would be a huge risk to stream the game due to there being no confirmation from either side. Your game isn't listed on the website, nor does your website provide any confirmation on the matter.
The staff say that if the game isnt registered on the website it probably is illegal to stream due to copyright. All im saying is if you take maybe 10 minutes of you day to put an announcement on the website, or put the game on the twitch TV list of games, you might be able to pull in more exposure than you already have, due to people not being scared to stream it.
i know that people stream it, but the amount of people i've seen not stream it due to what i'm talking about, is high as well. its the same thing with the vanilla wow server streams. People stream it, but the higher people were scared to due to legal. im sure your game isnt like that though :P so i don't see the harm in comforting your players :)
PS. when a person with 30k viewers at the time listen to the phone call of the game being sketchy, that's a rumor that will spread fast.