MLMs are pyramid schemes, not ponzis. For example bitcoin is a (somewhat decentralized, but centralized among major mining companies) pyramid scheme while Tether is a Ponzi.
Both pyramid schemes and Ponzis are illegal. MLMs are illegal in many places. In the US they were successfully able to lobby their way into carving out a legal niche in the 80s. They are also the reason supplement safety is so loosely regulated in the US.
Both pyramid schemes and Ponzis are illegal. MLMs are illegal in many places. In the US they were successfully able to lobby their way into carving out a legal niche in the 80s. They are also the reason supplement safety is so loosely regulated in the US.