This isn't correct. There are "comingled" and "non comingled". Sellers pay more for the latter. Also, there's FBA and non-FBA. Better distinction on the buyer

This isn't correct. There are "comingled" and "non comingled". Sellers pay more for the latter. Also, there's FBA and non-FBA. Better distinction on the buyer side would go a long way Of course, Amazon doesn't want any 1 seller becoming too poplular because that means they can stop competing on price.