Well, there's two aspects to that. One is that they tell you exactly how it works. The other is the marketing, where they all but promise you cheap goods.

Is it a scam? Is an advertisement for a beer a scam when it promises you women will throw themselves at you if you drink their product? You can play the internet "difference minimization through copious verbiage" game all you like, but I still think there's a qualitative difference.