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.