Bill Ackmann on Herbalife https://www.youtube.com/watch?v=bQc6L4ieMwo
Almost 60% of their distributors were latinos (http://articles.latimes.com/2013/feb/15/business/la-fi-herba...). The lengthy presentation countering Pershing Square's accusations which contained this fact (http://files.shareholder.com/downloads/ABEA-48ZAJ9/229776353...). There are countless stories of how these people were exploited in the name of gains.
They are expanding rapidly in international markets. In India, Herbalife has over 40 distribution centers now and over 0.5 million distributors ! They even got a famous sports personalities to advertise for them (http://www.herbalproductkart.com/herbalife-brand-ambassdors).
To do my bit in preventing people from falling for such scams, I asked my friends and mother to share it on their whatsapp groups so that people don't fall prey to such pyramid schemes.