Seriously, they should have went with dedicated boxes on something like Softlayer comme Dropbox. Unlike CPU-cycles, storage needs are relatively predictable as people usually don't remove photos after uploading them.
Softlayer - yikes! Was with them once and never again. AWS is far more flexible and cheaper (based on my experience). Not to mention the full suite of services available under the 1 umbrella from AWS where Softlater just cannot compete.