Fifth class would be when sellers repurpose old listings for totally different products, which keeps the reviews of the old product. This is a super simple pro

Fifth class would be when sellers repurpose old listings for totally different products, which keeps the reviews of the old product. This is a super simple problem to solve technically (just require manual review when more than 10% of the description text changes), proving that Amazon is absolutely complicit in whatever bad shenanigans are happening on their platform.