CloudFlare said there are “six expensive networks” — Telstra, Optus, HiNet, Korea Telecom, Telecom Argentina and Telefonica — “that are more than an order of magnitude more expensive than other bandwidth providers around the globe and refuse to discuss local peering relationships.”
“To give you a sense, these six networks represent less than 6% of the traffic but nearly 50% of our bandwidth costs,” CloudFlare ’s Nitin Rao wrote.
http://www.computerworld.com.au/article/605402/cloudflare-bandwidth-claims-overstated-telstra-says/