My sister is into networking business too. She has been successful with her Optrimax Plum Delight. At least she has products in her hand to show some proof. But recently, she joined this Emgoldex thing which is a pyramid scam. Keith and I warned her about it and even showed links of the cases this company have. But as usual with her, she and her husband didn't listen and is saying they're earning money. I don't know if they did get money from it. I just hope she didn't encourage my parents to invest in that fake gold scam!
I have friends who ventured into networking in the past, the most famous one was Forever Living and those Health---something (I can't remember the names). But eventually, they stopped and didn't really earn anything.