narfInteresting. I read an article a few weeks ago that speculated the content ID system that twitch implemented was a move twitch did on it's own in order to make them seem more marketable after talks with Google fell through. Looks like it worked.
No, this is mainly down so individuals don't get sued, there had been a rather large rumour 2 years ago about twitch not allowing music at all, this was going to be an issue that had to be addressed as twitch has been growing so quickly. One of the guys there said that they had to do it as if they get sued the company would probably go under. They have to start showing they are making the effort.