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This is just a publicity stunt. From a technical point of view it's ridiculous.
Radioactive generators are also aimed at the credulous. Most, if not all, hardware generators are either directly quantum mechanical or indirectly tied to it through chaotic behavior.
Entropy sources don't actually have to be particularly random, they just have to be not entirely predictable. Spinning hard drives have timing uncertainties that come from turbulence and friction - much better than a lava lamp.
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