This is the project I’ve seen that most closely follows a Huajiao-style Ponzi structure, @papertrade_xyz

1. It’s currently centered on mutual aid + dividends. The way funds are split isn’t clear yet, but the liquidity from PAPER rotating between higher and lower tiers later on could be recombined and recreated.

2. The house’s (protocol’s) profit formula is close to a variant of a mutual-aid scheme: Profit ≈ fees (haircut + win fee + frontend) + liquidity held up by queue delays +