Maybe so, but informing all participants that they are at risk of losing money is not scamming.
Give it up, QS, your dishonest argument doesn't make it any less of a fact that you cannot guarantee that all participants fully understand the nature of the 'scheme' and, due to the fact that their 'profit' is ENTIRELY dependent on whether greater fools can be conned into sending their money in, as opposed to, say, a roulette table or actual odds-based gambling, you are essentially stealing from people.
The chances of Red13 coming up on the roulette will always be exactly the same whether you know the mathematical odds or not. If you participate in a ponzi and fully understand how it works you will be actively working to encourage others to join in order to get a share of their money. The participant who doesn't quite understand it will send his money in and fail to realise he needs to find others to join if he wants to get a better chance of not simply having his money stolen. That's pretty fucking morally bankrupt of everyone involved who happily takes his money from him.
Happy? I'm not trying to take money from folks who are unaware how ponzis work. That's why I included links to wikipedia pages in every language explaining what they were.