Ok, my opinion for Ghpi:
I have over 13k in Ghpi, some from compound, most with deposits. But i am in profit.
I agree with your comments, 8% per week is really unrealistic. The new Cornelius not invested 13k in a programm like this.
But Frank is a german and in a famous german forum, Ghpi is a gem. One of the Members in our forum is the Mod in the german ghpi-forum and help by support. A other Member is meanwhile a partner of Frank in asia. He comes from Berlin. This Points a good signs i think.