The most famous provably fair HYIP was N9N (years ago) which was launched here on BitcoinTalk. I managed to make +2 BTC of net profit out of it, but nowadays that kind of Ponzi games won't work anymore if you were planning to set up a so called "Ponzi game".
The real working HYIPs are those backed up by real trading/gambling or multiple revenue streams and still they can collapse in case of bad periods.
I agree with you. Many hyip did pay the investors.
That is just the major problem because HYIP program have a long history of not paying their investors or pays some and scam others, the best scenario is the hyip program that last for 2 years before collapsing, we already know the end of an hyip program before they start which is collapse, scam and tears.
Please try another beautiful business, we shall support you.