Here on HN, we have a savvy audience that understands the problem on Amazon with counterfeits, fakes, and low-quality items. I don't usually have this problem myself, because I go out of my way to buy things from sellers that I recognize, such as Logitech for instance, which owns the top results for "webcam" even though they have fewer reviews and higher prices.
In your case, I think there are warning signs for the product in question. An unknown seller hawking a cheap knock-off looking webcam with a fake sale price... I really do not enjoy being the devil's advocate but, come on.
Amazon might reprimand the seller. They might even ban them. But if so, they will just pop back up over night with a new name. Their cheapo products are unlabelled, unbranded and modestly packaged for exactly this benefit.