This business has nothing to do with pyramid. It´s a network of private people - nothing else. BIG difference.
It says nowhere, that they have to sell a certain numbers - or find a certain number of buyers.
It´s exactly the same on Ebay. Private to private sales.
But you´ll know, when Blyth have 100% of Visalus. They will file the documentation of the legal business strategy.
This kind of business have been here forever - and will always be.