The idea is the scammer is the seller on Amazon. So the guy orders from Amazon Marketplace, the Marketplace seller uses a hacked Wal-Mart account to fulfill the order and pockets the cash from Amazon.
The problem with maxing out the stolen card is that you can't get cash -- you can get stuff, but even then, you have to give away your address.
Then they found the tracking number of a package sent to my city around the same time.
Ultimately the charge back failed when I reported fraud. They had a tracking number and invoice in my name, which my bank and eBay said had to be me. When I asked eBay to refund, they said the opposite as what they said to my bank. They said only the creator of the account could refund, not the person named on the account, so I could only refund if I found the fraudster and got their consent.