1. You “accidentally forget” to disable the feature in hardware. Given how competitive the market is, motherboard manufacturers can be relied upon to enable it in their “1337 OVERCLOCKZ” mode. No conspiracy is needed.
2. You “tolerate” this practice just long enough to win the critical initial wave of reviews and benchmarks. Interested buyers will look at those charts for years to come.
3. And when you finally do turn the feature off to protect the market for your server chips, you can plausibly claim that you had explicitly forbidden using this configuration from the very beginning. None of this is your fault.
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Edit/Addendum: Just to clarify my actual opinion, of course an honest mistake is more likely, at least for step 1. Very few “evil schemes” exist in reality because people aren’t all that clever (and all that evil). But the possibility is interesting to speculate on.