[mensetmanusman]

It was aimed at improving performance on state mandated standardized tests. They were effective, but if everyone did them, the curve was just shifted and no one seemed to benefit in particular (but society is arguably better off if everyone is higher IQ).

[em-bee]

that was what they were selling, but apart from the problem of everyone doing it, there were also many shady operations to outright scams that never even intended to provide the value they promised.