As Amazon claims, there are still many things that human beings can do much more effectively than computers, such as identifying objects in a photo or video, performing data de-duplication, transcribing audio recordings or researching data details. That’s why they created MTurk web service.
This could indicate that they could rely on this or similar services also to their own marketplace, e.g. for identifying duplicate or abusive listings. Stock Sellers and Dropshippers that try to abuse Amazon’s selling system will probably have to face more difficulties than just a routine AI scan.