It's pretty simple. If you compound at the rates shown on most HYIP sites , you could invest $1 and own the world in a few years. This site claims 800% in 25 minutes and 20,000% in a week.
Let's see - if you invest $1 you are supposed to get $200 at the end of one week.
Invest $200 and you should get $40,000 at the end of the next week.
At the end of 10 weeks, you should have $102,400,000,000,000,000,000,000. Let's call it 100 sextilliion for short.
Congratulations! You now own everything on Earth as well as the mineral wealth of all the other planets in the solar system. Did you really think the HYIP would pay out more than a few dollars (to entice you into investing more)?