It's unusual for commercial customers to pay for bandwidth on a per-byte-transferred basis. Instead, it's usually on a peak or percentile bandwidth basis. It's

It's unusual for commercial customers to pay for bandwidth on a per-byte-transferred basis. Instead, it's usually on a peak or percentile bandwidth basis. It's not cheap, but once you shell out for say a gbps of transit you can put a very large number of customers on that. The cost of the bandwidth ends up not being that large of a consideration.