1 rule = allawys think about winning and nothing but winning
2 rule = never get so greedy
Your 2 rules are both contradicting to each other. Rule 1 says is like that just always think with profit nothing but profit and that is making gamblers more greedy enough. And by making those aims to follow, I guess that isn't going to make you a productive one and that's going to be a good strategy except rule number 2 that we mustn't be greedy.
I don't think it's contradicting. It is just that you think about winning whenever you are gambling and stop thinking about anything else. Focus on winning. When you hit your target winnings, cash out. That's where the second rule comes in. So it think this is a good strategy to follow.
For me it is contradicting, what you would get if you keep on winning? Of course gambling involved money and if we are going to keep on winning our mindset will also be set with money. And I guess there are no gamblers that are only focusing with simply winning the fact that most of us are running for the profit that we can get with winning.