The Atkins diet (and almost every other diet I can think of) has been debunked, un-debunked, debated, berated, and praised almost from its inception half a century ago. It has not stopped the companies that promote the diet, produce the food, and publish the cookbooks, from making money hand over fist.

With any physiological system of sufficient complexity, whether it be human digestive/metabolic systems or the neurological systems responsible for memory and intelligence, there will be opportunities for profit as long as improvement of that system is desirable and a small fraction of the population believes they have the chance to improve it and the cost is reasonable. Plus, there will likely always be "success stories" to cite simply due to the placebo effect.

We have a massive alternative "medicine" industry that supports not only the people in it, but also, ironically, the people producing the constant flow of content criticizing alternative medicine. Lumosity will be fine.