I'm curious about how archive.org feel about this. Presumably they are paying for the outgoing bandwidth.
I can get a cheap empty prosumer NAS box for a couple hundred bucks and a couple TB of drives for a couple hundred more. If I gave someone (presumably the internet archive) a kilobuck and told them to keep the change (which would be a small but nice revenue stream for them), they could assemble a couple TB nas and ship it to me and I could plug it in and give it a public ipv6 address and aside from the kilobuck it would cost me a couple hundred bucks a year in electricity and presumably bandwidth, but at least it wouldn't have any labor cost. This might be going a bit far for individual citizens but you could probably guilt trip corporations into hosting your custom made NAS boxes for you. Just an idea to think about.
Another intriguing financial model might be to partner with public libraries and schools and double charge private companies in order to give public libraries and schools free backup NAS.
The world of non-profits opens up strange new ideas.
"It's costing us bandwidth" is only a relevant factor if your goal is to turn a profit, and the bandwidth use isn't contributing to that. An archive doesn't have the same considerations.
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.
Realistically, I'd estimate mirroring the IA to take years... providing you can keep up with its own growth.
"It's costing us bandwidth" is only a relevant factor if your goal is to turn a profit, and the bandwidth use isn't contributing to that. An archive doesn't have the same considerations.