system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:The Pyramid Scheme and how they trick you into it?
gpt
A pyramid scheme is one in which a person or organization convinces their potential employees that in addition to selling a project and making money, they will get a portion of the profits from any new employees they recruit.
It is called a "pyramid scheme" because a very small minority at the top are drawing profits from everyone they hired, everyone their employees hired, everyone that those people hired, etc, which can be modeled to look like a pyramid with many stones at the bottom and very few at the top. Were a pyramid scheme a legitimate business then there would have to be opportunity for UNLIMITED growth on an exponential scale. 
That's not the end of it though, because all employees have to purchase the product to sell from their superiors in the company. This way the employees have to pay to even have a chance at making profit. People get roped in because they don't understand the concept or because they don't realize that you shouldn't have to pay like they do to become employed with a company.