Tina.org once more thoroughly researched the MLM industry. Their sad findings: 97% of the companies make unsubstantiated income claims: Most members earn little to nothing (or even lose money) but companies keep making false and unsubstantiated income claims. These claims attracts new members, but most stop unsatisfied, disappointed or even with debts.
See Tina.org’s findings per company here. Watch here a video by Tina.org to get an overview of unsubstantiated claims. For an academic analysis of all ethical and legal problems of the MLM industry, see here.