I don't think all the ML PhD's in the world can fix a system with misaligned incentives. Anonymous seller says this product is the same as that name brand one,

I don't think all the ML PhD's in the world can fix a system with misaligned incentives. Anonymous seller says this product is the same as that name brand one, oh we believe you, we'll co-mingle them. This right here is undoing the whole point of a brand, that it comes from a known source. You can't ML your way out of that. The system is bad by design: it trusts those who have an incentive to lie. So when people say Amazon doesn't want to solve the problem, this is what they mean. Amazon doesn't want to solve the real problem (co-mingling doesn't work) and wants to tech their way around that. Some things don't scale, and dealing with people is one of them.