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%.[26] By 2009, 94.2% of DSA members were using MLM, accounting for 99.6% of sellers, and 97.1% of sales.[27] Companies such as Avon, Electrolux, Tupperware,[28] 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.[23] The DSA has approximately 200 members[29] while it is estimated there are over 1,000 firms using multi-level marketing in the United States alone.[30]

Plexus Worlwide is ranked by Inc. magazine as #8 (in 2014) and #132 (in 2015) fastest growing privately held company with a three year growth of 2833%; all while offering a 60-day money back guarantee on all its products – which means the products work. And at a consumer friendly price point. 40% of all sales are from customers and not ambassadors.
Although emphasis is always made on the potential of success and the positive life change that "might" or "could" (not "will" or "can") result, it is only in otherwise difficult to find disclosure statements (or at the very least, difficult to read and interpret disclosure statements), that MLM participants are given fine print disclaimers that they as participants should not rely on the earning results of other participants in the highest levels of the MLM participant pyramid as an indication of what they should expect to earn. MLMs very rarely emphasize the extreme likelihood of failure, or the extreme likelihood of financial loss, from participation in MLM. MLMs are also seldom forthcoming about the fact that any significant success of the few individuals at the top of the MLM participant pyramid is in fact dependant on the continued financial loss and failure of all other participants below them in the MLM pyramid.
Because of the nature of recruitment and the dream of living the life of riches, it is no stretch to the imagination that sometimes, the real picture gets blurred between the lines. Also, MLM is notoriously known for getting you on the bad books of friends and family. This is of course a general stereotype against the industry and not a concrete consequence.

For full disclosure, I want to point out that I am not affiliated with any multi-level marketing or direct sales companies, and that I don’t receive any compensation from the industry for my opinion on it.  I’m sharing this with you because after I wrote what is considered the most widely read, copied, and quoted MLM article in the history of the industry, I was accused of writing it to promote my own MLM business or the industry in general, which is not the case.