Are you trying to be funny? I expected you to do a little research with the search engine on what Pyramid Scheme is all about. Using Naija language, it is 419 covered with deceit so that people will think it is a legitimate investment.
Irrespective of how many people benefits from it, on the long run, some mugu will eventually become victims of the scheme, when the con-artist eventually pull the carpet off their feet.
There is no point getting emotional, get yourself educated on what Pyramid Scheme is all about. My article would have been a good place to start, but you might have consider me bias already, so I suggest you use Wikipedia for your research. Then you will know why Pyramid Scheme get attacked by genuine entrepreneur.