If Amazon can get sued every time someone burns themselves with a knockoff product, I would think their incentives would shift from: "Pay as little as possible

If Amazon can get sued every time someone burns themselves with a knockoff product, I would think their incentives would shift from: "Pay as little as possible for quality assurance, down to a floor of $0" to "Pay as little as possible for quality assurance, down to a floor of $whatever number would convince a court that we made a good faith effort to prevent knockoffs."