Actually MLM is not illegal in and of itself. The so-called
pyramid schemes where no goods change hands, are illegal in the main. MLM encompasses sales systems such as the notorious Amway distribution system, where you buy goods and on-sell them to others, so on down the
tree. Theses schemes are legal by virue of the fact there is an actual product sold at each point. If money changed hands with no product, that would be illegal.
That's my understanding, anyway.
Cheers
Mick