It's possible that they keep selling them because the issue was silently fixed with a hardware or firmware revision. And of course they don't reply because they know anything they say will be used against them in a lawsuit. These days with the short attention spans of people it's more intelligent to do nothing but wait until things blow over.
it seems more likely that they keep selling them because they like money, and never fixed it, and don't reply because they know that nobody can do anything about them not replying (their liability is a good point, too)
since we have no evidence the issue was fixed, and since it seems to still be happening, we can safely assume it was not until such evidence arises
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