One possible line is that you can't have a vendor-vendee relationship between two parties if one of them doesn't know the other exists. It's nonsensical to clai

One possible line is that you can't have a vendor-vendee relationship between two parties if one of them doesn't know the other exists. It's nonsensical to claim that Amazon is facilitating a relationship between manufacturer and buyer if we take at face value the claim that they don't even know who the manufacturer is. At that point, Amazon effectively owns the product and is a reseller.