A bounty campaign itself is worthless if the ICO itself is a flop. This is why before I venture into a program I always look out for things that would at least give me some insight as to whether it is worth it or not. From a good whitepaper to an awesome team members behind. If these are set up, it is most likely to be a good bounty. Bounties are important for ICOs, as it is really one of the good ways to promote them.