Its not a case of the scientific community being unaware of this, even the Wikipedia page of "Cognitive training" has the paragraph in the summary: "Scientific

Its not a case of the scientific community being unaware of this, even the Wikipedia page of "Cognitive training" has the paragraph in the summary: "Scientific investigation into the effectiveness of brain training activities have concluded that they have no impact on intelligence or everyday cognitive ability, and that most programs had no peer reviewed published evidence of their efficacy." Its just a bunch of people that profit from it and no amount of negative research papers will dissuade them as long as there is money to be made.