Ore mine is a ponzi, ponzi schemes are not good investments, they are scams, you are obviously advertising them because you want refferals but no, don't do it. https://bitcointalksearch.org/topic/ore-mineorg-242718-btc-paid-new-years-mines-added-the-real-income-759702 Investor based games = ponzi.
Hahaha, yeah it's called an affiliate campaign. I'm not sure exactly how the ore-mine.org site works but it seems there's a pretty high level of satisfaction. By the way, "investment" in general is gambling, so I guess ore-mine.org is similar in this regard.
maybe they are not scammer because the return is very low unless you invest a fortune, or because they scam only those that have invested a high amoun, this is another common strategy among ponzi