"You will find that supply-demand have nothing to do with pyramid schemes."
Getting people to buy in is the only way to create in value a pyramid scam. A pyramid scam is dependent upon a fresh supply of suckers demanding to participate, and the only way to profit off those suckers is to get them to think they're going to profit off the suckers they can lure in themselves.
It's one big happy family of snake oil salesman preying on the people they see as here to give value to their scam, and it always ends the same way, with a collapse because there was never anything of value there to begin with.
There was merely a way to extract value from suckers.
It's all dependent upon creating a demand through the promise of profit, and I say there's no bigger scumbag than somebody selling a pyramid scam to their friends and family.