No, not US specific. I see some of sellers in my country includes stickers or keychains just to change ASIN.

One aspect is that not everything has counterfeit counterparts, e.g. there is no counter-counterfeit to, specific counterfeits, products that require exotic parts, or foods.

I’ve never seen a 4-cell(Lipo) knockoff battery for Lenovo X200 and I know the reason is because it is not easily possible to source appropriate components.

So there could be specific usage model for Amazon of a person that could completely avoid receiving unexpected items.