I'm guessing Amazon would be liable if they sold non-conforming devices, no? The charger described in the article clearly didn't respect the rules. Or maybe it's different in the US.
Amazon sells busted, bootleg products all the time, and the reviews can end up in the 1 star area. They don't pull them.
For a while literally all the XBox 360 wireless controller adapters on Amazon, for example, were Chinese knockoffs. For some reason Amazon stopped stocking the real ones, and let vendors put up knockoffs branded as the real thing, despite the reviews making it clear that they were fakes (and broke easily).
Amazon often has problems with listing knockoff products under the same SKU as the real thing. The Arduino project has had some serious problems with this in particular - for a while, if you bought an Arduino board, it was a roll of the dice whether you'd end up with a genuine one or a knockoff.
I bet the same thing was happening with the XBox controller adapters.
The charger I tore apart was from eBay; see the article for details. Cheap chargers shown on Amazon are typically sold by third-party sellers, which I think lets Amazon sidestep any quality issues.
