Great idea. We have that actually implemented, but are currently not displaying it. Unfortunately people are even less likely to give a website access to their emails, since this often means giving access to pretty much everything (through "I forgot my password" emails)

Amazon has order reports, do they not? Why not just allow importing of that?

Or use this

http://www.amazon.com/gp/help/customer/display.html?nodeId=2...

I know it puts some burden on the customer, but as a fallback, it's better than losing them.

We tried it ... however, the steps (go to Amazon, download the history, search it in your downloads folder and upload it on ShelfFlip) was a bit too confusing - so we don't offer that option (at the moment).