It's not the through put, but the fact when the CPU is idle it is sleeping saving power.
This is true on mobile, not for servers as internally they'll poll their ethernet phys.
It could just as easily have been tested extensively but no testing is 100% guaranteed, especially in a world wide service as complex as a CDN. People who think perfect code comes purely from testing are delusional.
How? Example: I sell you a good at inflated price and you resell it at shipping cost. You make 0 profit.
I made all the profit. I'm outside the G20.
You're my corp inside the G20.
Your tax rate is zero