Multi-level marketing (MLM), also called pyramid selling, network marketing, and referral marketing, is a marketing strategy for the sale of products or services where the revenue of the MLM company is derived from a non-salaried workforce selling the company's products/services.
MLM business model and a pyramid scheme is that a legitimate MLM is focused on selling products, not recruiting more salespeople. In a legitimate MLM, it should be possible to make money by simply selling products directly to customers.