It's not only the scammers how brings the scams or Ponzi scheme come into being. Its also greedy behavior of the users that helps others to do fraud. Blame is not only on the scammers, but its also the responsibility of the users who don’t check the company details before it does a scam. Most people wake up after the scam done. If little search work is done before investing it can save from being scammed.

A South African company scammed people with a Ponzi scheme. The scheme was to invest as little as $7 and get back 100% amount in just 15 days. Scheme get popular quickly. After its gone popular they stop accepting less than $337. The amount daily invested by the people in this scheme was approx $135,000. After investment now, people are waiting for the 100% return but the company is not giving any positive response and considered a scam. It was expected because they were offering high returns just to attract the people. Returning that high profit was not possible.

So the investors have to check these type of Ponzi schemes before investing in. It is useless to think after the fraud happen. It's investors greediness that helps these type schemes to happen.