pay as little as possible per GH and stay focused on the very very very shortest possible ROI term? That's exactly what is killing the industry right now. Loads of people pulling as much money out of the crypto coins without putting anything in. Doesn't take much of a brain to realize such a situation can only head towards the bottom. Short term ROI for mining is dead and people who are still chasing that are filling page after page with whining and yelling scam and ponzi.