Are you referring to third party seller sales on the amazon.com websites?
That's completely different and separate issue from AWS customer data (for example someone running e-commerce software on a linux VM).
3rd party seller sales pay Amazon commission on each sale - deciding which products are selling well is just a matter of Amazon doing a SQL call on their own sales database (much like a physical retailer may see what brands/products are selling well)
(S)he's just saying that Amazon's claims about their business practices can't be audited by anyone and are therefore unenforceable except by lawsuit on a timescale of years.
That's completely different and separate issue from AWS customer data (for example someone running e-commerce software on a linux VM).
3rd party seller sales pay Amazon commission on each sale - deciding which products are selling well is just a matter of Amazon doing a SQL call on their own sales database (much like a physical retailer may see what brands/products are selling well)