Where the consumer ends up out of pocket? I realise scamming ligament sellers and brands is endemic; but it is still a safe place to buy as far as I can tell?
Out of pocket? Perhaps not, especially if it "works" as intended. Putting your life in danger and house burnt down though? More likely than you realize.
Let's not even mention the health and nutrient products that make the FDA shudder.
Sure, you can ask for your money back, and flag the seller. But new sellers pop up selling the same crap all over again with a new name and company ID. This is all while real sellers of real (and safety certified products) get pressured by Amazon and dissuaded from taking their business off platform.
Avoid Amazon if at all possible. It's not good for consumers nor sellers, and it's keeping a leach on online retail.
Most countries have laws around liability of sold products. This is often set up to fall on the importer of said product. Amazon Europe (and perhaps USA) is doing something very funny with these laws; You, the consumer, is the importer. If your house burns out, then it's between you and a random chineese ghost companny that just disappeared into smoke. Amazon is "handling the import paperwork for you", and not taking liability for anything.
A lot of consumers have no idea they got a cheap imitation. Counterfeiters have gotten quite good, and in many cases the scam is "falls apart in a year instead of ten", not "it's completely non-functional".