Defacement: Sellers armed with the accounts of Amazon distributors (sometimes legitimately, sometimes through the black market) can make all manner of changes to a rival’s listings, from changing images to altering text to reclassifying a product into an irrelevant category, like “sex toys.”
Phony fires: Sellers will buy their rival’s product, light it on fire, and post a picture to the reviews, claiming it exploded. Amazon is quick to suspend sellers for safety claims.
Amazon Marketplace Fraud
Fascinating article about the many ways Amazon Marketplace sellers sabotage each other and defraud customers.