Amazon's 3rd party market system has long been this way. Products of all sorts slip
through the cracks, but I think of their model in much the same way I think of Visa or Mastercard, very limited security, and fraud happens. Weeding out all fraud or policy misuse is not the goal. The CC companies know that there will be thefts and losses. Amazon knows there will be some 3rd party companies whose products suck or slip
through the policy cracks. Refund those customers who are negatively affect, and maybe take legal action against the fraudsters, if it is worth it, but often it's not. If a system works say 97% of the time as intended, and the system is profitable, then the 3% of frauds (or in this case policy abuse) are more then tolerable.
As for this clone, Philip Morris is more likely to take notice then Amazon