This article is so cynical. Anything popular is an opportunity for profit. We live in a system where we transfer products through sales, and profit is necessary to keep products available.
No one gets into selling ketogenic products to make it rich. Popular or not, these diets are nothing compared to the mega corporations that run grain sales.
I mean frankly dude, what exactly do you want? Any diet, good or bad, will offer an “opportunity for profits” and frankly the better it works, the greater that opportunity.