Let's put it in terms of business. What does Amazon gain reading the data of retailers in AWS that they don't already have? How much more money would this make them?

How much brand damage and lost of business to AWS (their most profitable organization) would they lose if this were to leak? The more prevalent their use of this AWS customer data, the higher the chance it gets leaked.

Why do you think Amazon, one of the most logical and data driven companies, would make such a bad business decision?