I'm very aware that IA is an open, non-profit archive and I'm sure that they don't mind that other copies of the archive exist. My question was about the cost to IA of transferring 12 petabytes (according to Jason Scott [1]). Outbound bandwidth ultimately costs money. IA is a non-profit and "It's costing us bandwidth" is very relevant.
For instance, here [2] are the charges for outgoing bandwidth on Rackspace cloud servers. The lowest quoted rate if £0.06/GB for up to about half a petabyte. IA won't be paying that much as they have their own infrastructure. But even if bandwidth only costs the IA $0.01/GB, 12PB would cost around $125k.
12PB is a lot of data. I don't know what IA pay for outbound bandwidth but it won't be zero. Thats all I was asking about.