Some have. Blizzard used a variant of BitTorrent about 10 - 15 years ago to distribute the multi-gigabyte patches for their online games. Peak demand was very

Some have. Blizzard used a variant of BitTorrent about 10 - 15 years ago to distribute the multi-gigabyte patches for their online games. Peak demand was very high with hundreds of thousands of users all on the same day. It was built into the game installer / launcher. I think they've switched away from that since. I remember it causing some consternation at the time given some people pay by the byte for network service and felt it was unfair.