Well, this is a scam. The system works by cheating people and finally convince them to put their money into a circle, pyramid, or whatever. They begin at the bottom of the system, and the ones in the top receive money. Supposedly, the newcomers will be able to climb to the top, so, eventually will have rewards, but the reality is: if there`s nobody under you, you will never get anything, so, your work is to scam others and put them in the bottom, so you can rob them.
Obviously, when there is no longer somebody at the bottom, the system falls and many people lose their money.

Basically, it is a Ponzi scheme.