Earlier quoted context omitted.
Willfully participating in a Ponzi scheme is a crime.
Rather than Ponzi scheme, I'd classify the investors as participating in a Pump & Dump. A Ponzi scheme is when it's an investment vehicle (i.e. hedge fund) that provides returns to older investors through capital acquired from newer investors. In this case, by contrast, it's overhyping (to the point of fraud) a publicly traded security in hopes of rallying some investors to buy in, which increases the price, further…
Isn't that exactly what they did?
From the Article:
> Pincoin was particularly unique in that it offered bonuses for bringing other people into the program, a tactic that might sound familiar. The scammers paid out in cash until January when they began sending iFan tokens.
Pump and Dumps make their money by selling the asset once it's price has been inflated. In this case, the money was made throughout the whole ICO by fraudulently selling a security.