Actually, it's not bad. The most interesting conception there is that if you make any deposit you have a chance to obtain so money randomly. For example, one member deposited 1 BTC and now he have 3.5 on return (more than 1 BTC he obtain randomly).
So, some more motivation strategies are in development. But it's always good to join a pyramid in the beginning. But there are almost no reason to join it without any deposits (with 0 deposited you don't have any chances to receive a random prize (even if system will choose you)).
Lucky ref:
http://bitcoinpyramid.com/r/51