the science is from the mid 1800s however many (possibly this website) have gone beyond science into the realm of quackery. These people quote enough science, and their samples played into various audio visualization hardware/software would appear to be the genuine article.
Their pricing may be a bit high, and many people may be forgetting that the science shows variables in the behavior of brain entrainment protocols between the genders, based on age, based on where a woman is in her cycle, etc. which can make any entrainment more or less effective for any individual at any given point in time.
Website claims unbelievable actions by Binaural Beats
This products are unsuitable for minors and may even be dangerous for adults. Not safe / Not trusted
I know this site. And I'm a subscriber of it. I received emails about brainwave recording tech every week. They are useful... I don't know why you rate it as scam. But I personally love this site.
While it is an unusual site, I purchased tracks from them to aid my wife in pain. They delivered them, they were high quality and my wife (who knows nothing about this stuff) preferred this over any pain medication. I have never been spammed by them. I am unsure why such a low rating.