Disagree.
I successfully withdrew more than I invested. Just a matter of math. And (perhaps) luck.

...Yeah after you covered your own 'investment'. LOL
LOL?
I deposited 0.001 on account A and withdrew 0.00250997
I also deposited 0.004 on account B and withdrew 0.00635144
Whoa! I earned 0.00386141 BTC! But in terms of ROI I got 77.2%! Not a big cash, but at this stage of
www.CrazyPonzi.com/?r=228 it is just what one can get. Unfortunately, the owners decided to kill their own project by increasing minimum investment by 10 (TEN) times. That could be feasible if number of players increased by minimum 5 times, but not now. Thus I think it is wise to step back before it dies completely (somehow no-one is investing for two days now, right?)
Anyway, to sum it all up:
1. Can anyone play? - yes
2. Are the rules clear? - more or less - yes, see my previous post for details:
https://bitcointalk.org/index.php?topic=926237.msg11381777#msg113817773. Can I withdraw all my money? - yes, at daily basis
4. Is referral program working? - NO, I did not got additional money on account A after creating and funding account B (or I miss something, maybe it should be more clearly stated in some sort of Account History page to avoid doubt).
5. Is the game transparent? - to some extent only, there is no 'account history' nor deposit / withdrawal dates (there are amounts, however). There is no information WHY investment expired (i.e. bank roll amount at the time of expiration).