The Direct Selling Association (DSA), a lobbying group for the MLM industry, reported that in 1990 only 25% of DSA members used the MLM business model. By 1999, this had grown to 77.3%. By 2009, 94.2% of DSA members were using MLM, accounting for 99.6% of sellers, and 97.1% of sales. Companies such as Avon, Electrolux, Tupperware, and Kirby were all originally single-level marketing companies, using that traditional and uncontroversial direct selling business model (distinct from MLM) to sell their goods. However, they later introduced multi-level compensation plans, becoming MLMs. The DSA has approximately 200 members while it is estimated there are over 1,000 firms using multi-level marketing in the United States alone.
If you insist on trying one of these MLM offers, the least you can do is look for proper business registration with BBB, toll free number, and proper address (no Post Office box). Also, you will need lots of family and friends to make it work. As a final step, check the MLM materials for one or more of these "red flags" that are associated with the worst of the offerings: