This is just how any other gambling works too. Most of people lose and house and those who win will get their money.
In proper gambling, with provably fair odds, those who win do not depend on those playing after them being incited to make a deposit in order for that deposit to be taken by the 'house' and shared with the earlier 'player'.
A ponzi isn't gambling, it is a mathematically unsound pyramid structure of passing money around until it collapses.
But if they are very clear about how it works I don't see why it is worse than any other gambling.
Please click on the green text in my sig and try to understand why it is not about you or your money, it is about your lack of concern for how you profit, even if that profit is derived from money stolen from other people.
BTW, please don't try claiming that *everyone* who participates does so knowing fully what they are participating in. That is an assumption I have already disproven by way of the pm's I have received from people who genuinely didn't understand what a ponzi was after sending money to one.
There are people from all over the world using this forum. They don't always understand what they are reading, so you can't guarantee that all participants are willingly losing their money.