P2P software REDUCES congestion, and avoids the situations most HTTP downloads would just keep trying to hammer their way through. To distribute Blizzard patches to several million users simultaneously using the regular HTTP/unicast methods would require a port into the 'net that's the size of a national backbone.
Pay Limelight or Akamai like a proper company »www.akamai.com/html/customers/cu···ist.html . Intelligent localized caching and distribution and redirection of clients to the closest server. Datacenters all over the world. Almost no transoceanic link usage by clients connecting to a CDN.
