Definition of a Pyramid Scheme

"A pyramid scheme is a scheme in which an individual pays for the right to recruit additional persons into the scheme who, in turn, recieve the same right to recieve profits from recruiting others.
Three common elements of a pyramid scheme have been identified as:
1. A large, required initial investment or purchase of inventory.
2. Direct payment for recruiting additional persons into the scheme.
3. Heavy emphasis on recruiting additional persons, with little or no emphasis on selling products to consumers."

Doesn't seem like a definition of Quixtar...