Is Isagenix a Scam?

Is Isagenix a Scam?: What do US Government regulators think of Isagenix and other businesses that sell products via Multi-Level Marketing (MLM)? They clearly wish they could shut these businesses down, because they pose a danger to consumers, but since the US has a very free market and very limited regulation of the supplements industry, they do as much as they can to discourage MLM business models, and try their best to warn consumers.