Netflix has considered it in the past, so there must be some kind of catch. If it's a technical reason, I'd guess at poor ISP performance when it comes to a la

Netflix has considered it in the past, so there must be some kind of catch. If it's a technical reason, I'd guess at poor ISP performance when it comes to a large routing table with many small transfers from many IPs. In contrast, Netflix currently puts caches on location at ISPs, creating a fast CDN and allowing the ISP to do quality of service filtering on Netflix data (probably to make it faster than other p2p data?).