Amazon didn’t create the problem of counterfeiting, but they did create the problems on Amazon. If I purchase something on Amazon and it is counterfeit, I can’t blame or avoid the counterfeiter because Amazon has commingled inventory. Even if I buy from a trusted seller or even Amazon itself, I might get a counterfeit item. My only choice in that case is to not buy from Amazon at all.

If I buy anywhere else that allows third party sellers, I might get a counterfeit item, but I’ll know to avoid that seller in the future. And I can develop a meaningful relationship of trust with sellers; seller reviews about counterfeits will have meaning; and I can shop with a lot more confidence.

I think the point is that by creating a system that makes counterfeiting easy and doing nothing to stop it when they knew it was taking place (or now demanding payment to stop it), Amazon is somewhat responsible.