This is not especially dissimilar from how CPUs were made and marketed for years - CPUs that wouldn't clock at 1.6GHz would get sold as 1.4GHz, for example Kin

This is not especially dissimilar from how CPUs were made and marketed for years - CPUs that wouldn't clock at 1.6GHz would get sold as 1.4GHz, for example Kinda like how ladders are rated: they say 300Lbs .. it'll probably take more than double that - but if it breaks when you overload it, the manufacturer can point to the rating and say, "you exceeded its spec"