In April 2006, the FTC proposed a Business Opportunity Rule intended to require all sellers of business opportunities—including MLMs—to provide enough information to enable prospective buyers/participants to make an informed decision about acquiring/joining a business venture with information disclosed about the average likelihood of monetary profitability (and the extent of monetary profitability, if any) of acquiring/joining the business venture. In March 2008, however, the FTC removed "Network Marketing" (i.e. MLM) companies from the proposed Business Opportunity Rule, thus leaving MLM participants without the ability to make an informed choice of entering or not entering MLMs based on the disclosed likelihood of success and profitability:

This is one of the best ways of just getting out there and into the ears of people who will end up being prospective clients. Everyone should be your target and just getting the word out should drag in quite a few leads, if the product/service is good enough. This is why the first goal should always be to find the kind of product/service that is worth it.
An example of a high-profile multi-level marketing company defending its practices is Herbalife Ltd., a manufacturer and distributor of weight-loss and nutritional products with more than 500,000 distributors. Although the FTC had been investigating Herbalife, it was activist investor William Ackman who shed a national spotlight on the company by shorting $1 billion of the company’s stock in 2013. Ackman accused the company of operating a pyramid scheme and backed his allegations with a bet the company’s stock price would fall under the weight of the scam.  
I thought this article was fantastic. I currently work with an MLM and love it, but I definitely can see why MLM’s would have flaws. However, I also know for me it wasn’t about selling as much as it was SHARING. I have experienced more than a product, I have been able to share the gift of health and the gift of the business itself. I absolutely love it and people who join me in this mission are as passionate as well! I believe when we look at really loving people where they are and actually caring, success will come and not the other way around. That’s the only way I’ve been able to see it happen! Any who, thanks for the tips!
If you build a motivated sales team, you could potentially earn a substantial amount of residual income, which means more free time to grow your business. MLM leverages the power of "word of mouth" to reach consumers. A good product in the hands of a motivated sales team may spread to family members, friends and neighbors rather quickly. In addition, your overhead cost may be minimal under a MLM structure. You may operate as a home-based business, using your own space for storing the product. Much of your operating expenses go toward paying commissions to salespeople, but since this is a variable cost, you only pay when a person completes a sale.
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