The reason they closed down your "cable TV service" was largely because it was your "cable TV service". Compared to twitch that website must have been an absolute nightmare to run.

You may as well complain "I'm upset that the city bulldozed all of those crack houses; they were a really great place to buy crack."

Because Justin.tv wasn't for cable TV broadcasting. It was for generic streaming. Those who were streaming TV and whatnot were doing so illegally.