Counterfeiting of batteries generally, and counterfeiting on Amazon generally, have become critical path problems for a lot of hobbyist communities where having a quality supply chain is safety critical. This is not new. It's true as well in things, such as the car community, where many online supply chains are corrupted with counterfeit safety-critical items like wheels and brake calipers.
One of the realities of the world is that "you get what you pay for" is actually true. This has become clear specifically around the batteries issue and also in the car community where specialist online retailers who charge a premium are the go-to places to buy safety-critical components, specifically and exactly because anyone who cares does not want to accept the risk of a safety-critical item failing to save a few bucks. On the flip-side, many people in hobbyist communities are ignorant cheapskates and unfortunately their penny-pinching drive helps to proliferate counterfeiting.