A scam will be a scam.
It won't sustain in long run, cause they can't make $ for you at all, they don't have any business model or investment plans to make money grows.
All they did is use other people's $ to pay other users, so those who earned $ is just from other victims... in short a vicious cycle.
People KNEW, but they just dump their $ in hoping for a miracle.

Maybe I have to give another example for people who can't understand.
It's like- Going down to dirty sewers looking for fresh air.