Facebook and Twitter
[BitTorrent Live is a cost effective method for distributed file sharing for live video. See]
Facebook and Twitter Use BitTorrent Internally to move files around. Ars Technica revealed Facebook’s usage of BitTorrent:
Moving a 1.5GB binary blob to countless servers is a non-trivial technical challenge. After exploring several solutions, Facebook came up with the idea of using BitTorrent, the popular peer-to-peer file sharing protocol. BitTorrent is very good at propagating large files over a large number of different servers.