Fad diet; rebranded "keto" diet; guy trying to make a quick buck off the weak minded.
Remember: Keto diets alter your brain chemistry. It's origins are from a diet designed for kids with seizures.
I use ketogenic diets to "cut" every once in a while.
You do not want to do any diet like this over a long period of time... unless you're a child with seizures under the guidance of a medical professional.
"In the 1980's two men dominated--sometimes each other, most of the time everyone else."