If they did that they would be highly unprofitable though. 3rd party sellers pay them for ads. Then they pay them if a product is sold. And then they pay them

If they did that they would be highly unprofitable though. 3rd party sellers pay them for ads. Then they pay them if a product is sold. And then they pay them for packing and shipping the product. And then they pay them if the product is returned and they don’t even get any of the money they pay Amazon back if the product is returned. It’s no wonder Amazon is filled with sellers of fake products because any seller of legitimate products could barely survive on their marketplace with all the fees Amazon showers them with.