This scheme is well planned to the extent that they where brainwashed to think that the money they invested is to help someone else so if you want to help someone, you expect something in return? Thats how they want all participants to think. That's the reason why the buttons there to invest says Provide Help. It may take time for this to collapse unless the Government will intervene.
Most participants know it is a scam. But they think they can get back the money before the scheme collapse. They are not the last one to lose.