[chis]

If you're ordering 500 petabytes you probably sign a contract with Amazon, and have to let them know in advance if you want out.

[mc32]

That's a good point --but they didn't start with 500PB, when they first went to AWS they probably only used a few PB to begin with and grew "organically" over the years. But likely still had some contractual stuff for this kind of scenario.