I second Parshaman.
I also am involved in one which is perfectly legal [Ambit energy]and it’s one of the fastest growing companies in America. A few leaders are frum yidden who make [more] than enough money to support a family, though most Heimeshe people involved dont make more than a couple a hundred a month. There are many perfectly legal marketing companies. The one I mentioned above work together with many local utillity companies such as ConEdison and National Grid. This company happens to sell a service- electricity not a product. That said, not everyone who joins is succsessful. I’ts not a “get rich quick” scheme. It takes work just like in any other sales field.