Indeed bounty campaign requires a strategy. If you misapply the strategy then your time and thoughts are just wasted. You have to choose the right ICO. You should know the ICO in depth. Take your time to read the ICO whitepaper so you can understand the ICO completely. You have to know what ICO is doing what projects, how the chances of success, what strategy, what are the challenges and so on. The key to your success in bounty campaigns is here.