HYIP i-TECH invest

i am not sure about the HYIP you've said. some allow us to start nothing at all plus even give us a bonus of 50 dollars to start out with. the question is, how will they earn from us? and in the long run, how can they pay us? i had been to several HYIP sites and got scammed. usually, these are those that promises us big interests. they are those that declares bankrupcy after sometime. i am in this one HYIP site for more than a month now. it's interest offers are not that high but satisfying and better than interests that i get from the bank on my savings. they have paid me 8 times already after my investment has matured. and the transfer from the site to my e-gold account when i request for withdrawals is done in an instant. i don't have to wait for hours or minutes just for it to be transfered. it's transfered in an instant.