[samatman]

This also points to a hidden advantage Amazon has which is totally unethical. Namely, Amazon is perfectly willing to sell counterfeit name-brand goods, and presumably this doesn't extend to their own Amazon Basics products.

I don't think this singlehandedly explains why Amazon is so unwilling to do anything about their huge counterfeit problem, but it's suspicious that the dilemma resolves in their favor.

[salawat]

It's because they don't have liability for it because they act as a platform. Whereas with Amazon Basics, they risk their brand.