Isn't "fulfilled by Amazon" more trustworthy since they are shipping the product to you rather than a 3rd party? Or does Amazon fulfill counterfeits too?
The way it works (as far as I have heard) is that when it's "fulfilled by Amazon", the vendors will ship Amazon their products.
Amazon won't really do much in the way of vetting them, and then just throws them all into the same bin (i believe they go by the SKU and not much else). When you order from any of the vendors that sell that exact item, they just pick one at random and ship it to you.
All it takes is one bad actor to ship a bunch of counterfeit stuff to amazon for fulfillment and then it's possible to get counterfeits from ANY seller that Amazon fulfills.
This is exactly how it works, other than it's based on ASIN, not SKU.
The only way it changes if if the person sending their inventory to amazon chooses to have their inventory not commingled for a premium fee. Seller that do not commingle their inventory have no way of advertising that to buyer right now though.
