I see this sort of complaint ("I can barely buy from Amazon because of all the scam copies and fake reviews") somewhat often online, and I don't understand. I've placed 15 orders in 2018 so far (76 in 2017), and I've yet to find a detectable fake. (One of those things was even a printer toner cartridge, which I halfway expected to be fake given the stories you hear.)
Anything and everything probably, it can be seen even in reviews. I was looking up some gloves and often the reviews are split 50/50 between great and complete garbage. I assume that the unlucky half got counterfeits. Recently I have bought some plastic plates to put under a flower pot. The dimensions were completely wrong: as in, the advertised plate was for a pot of 22 cm in diameter and this was even printed twice on the plate itself - it was not even 18cm large. This was on a product with over 4.5 star average.
I still buy stuff on amazon because returns are very simple, but I got into habit of immediately returning anything which is not good enough. I feel that most of the stuff one can buy there is garbage.
What are people buying and receiving fakes of?