Interesting, but i don't think randomness in ponzis interest the community.
In my opinion, when i invest in a ponzi, i want to know when i'll be paid.
With a fixed 1 ETH deposit and 1.25 Multiplier
http://www.wolframalpha.com/input/?i=u(n)%3D((1%2Bu(n-1))+mod+1.25),+u(0)%3D0Queue increase by 1 every 5 deposits.
It means that the majority of people will play with a queue >3 people. I assume that a pyramid get slow when queue is 10 deposit long, if everything is working fine.
The majority will bet 1 ETH to get 0.25 ETH with a probability of 1/5 in average (decreasing every 5 deposits). It is even more gambling than before i think, it is fun, but crazy :p
However, Kara, i suggest you should spend time on The Greed Pit, and The Carrot, making fabulous websites, etc ,etc, good luck friend