The challenge there (and the exploit being attempted) is the 'too big to fail' concept. If you don't have enough people signed up, your ponzi can fail because

The challenge there (and the exploit being attempted) is the 'too big to fail' concept. If you don't have enough people signed up, your ponzi can fail because a sufficient number of people who haven't fallen for it, can object. If you manage to get everybody signed up, it becomes necessary to not break your scheme, since everybody loses. I think this is like an unholy hybrid of the ponzi scheme and the Silicon Valley unicorn. It's the great exploit: if you can burn everybody, hard enough, you win forever. You blow up past the point where there is any possible remedy.