I've been a victim of them and I did promised to myself too. I lose the trust of my close friends because I invited them to join with this scams but right now I don't talk to them anymore and if ever I can be again in the early stage of it. I won't waste my time to get in there because it will just wrecked my life again and will lose my money and people that are close to me.
Yeah it is just profitable for those people that are influential. But the bad side of it is every people that are you going to see, you will treat them as instant profit even though they are your friends. As long as you are greedy, friendship will doesn't matter to you anymore and that's what I'm avoiding right now because you will still the loser in the end, you lose people, you lose trust and you lose money.