There's an upside to this. It can be used politically as an argument against backdoors for "lawful access"[1] to encrypted data.
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my tinfoil hatted guess? china this past week had talks with FR, RU, BR and others. they probably got 3+ favors in exchange of this leak.
Or, someone wanted to blacklist someone else's key without a public name and included it in this leak. i wouldn't doubt MSI, intel and safe-pc-for-criminals-r-us keys happen to be present there.