Why are people so against sites like this?
Also people dont even know how many ponzi schemes are in real world. Look at auctions. People are buying expensive old paintings or old cars and selling it later with profit. Paying really huge money for this. Why not jump them and say they are stupid? Or markets, or even housing. If value drops someone will be left with that bag.
A value drop is not what defines a Ponzi scheme.
In Ponzi schemes it's certain that someone will lose, because there is no other way.
E.g. Buying an old painting isn't one. There are people with a lot of money that appreciate this art and want it.