Pyramid scheme
A successful pyramid scheme combines a business that seems real with a simple-to-understand money-making description which is used for profit. The idea is that the first person, Mr. X, makes a payment. To get money, Mr. X has to recruit others like him who will also make a payment. Mr. X gets paid out of money received from those new people (recruits). The recruits go on to involve others. As each new recruit makes a payment, Mr. X gets a part. He is promised always increasing benefits as the "business" expands.