When scammer launches the HYIP, he spends his money on the web site (hosting, script, design, advertising, etc.). From amount of costs depends period during which HYIP will recoup costs. HYIP administrator expects to receive more money than it spends, and until he reaches that goal, it will pay to all investors. In this interval of time you can earn in HYIP. Some programs are working less than week, and the other for 1-2 years before they stop paying and become SCAM. It is real to earn in HYIPs, but you need to know how to choose programs and which strategies use for investment. Using of referral program and RCB will speed up the process of making a profit.