The fact that listings can be changed more than a certain amount, without some sort of review and cost associated with that, is a huge gift from Amazon to fraudsters. It's the platform being designed to enable fraud.

Not a week goes by without our collective nose being shoved in the pile of poo that is Amazon's fraud platform wearing a cheap façade of ecommerce. And we still have trouble admitting it.

When a platform is designed for making money above all else, while willfully ignorant of humanity's millennia-long history of using fraud in pursuit of money unless that option is ruled out, and takes no steps to rule it out, it is equivalent to being purpose-built for it.

They probably cannot at scale. I'm sure they would if they could; it is very likely a source of embarrassment.