Exactly my thought. For, say, $50/month I can get a second ISP to my house, host the proxy (and only that) on that link, and enjoy free movies. It is cheaper than having 2-3 streaming service subscriptions.
Also most of them are for pirating live TV. You can't watch live TV through Bittorrent, you just can't, it doesn't work that way. Sports fans need less than 5 seconds of latency relative to the loudest neighbor they can hear, or they'll hate your service.