I don't think the reward is a waste of time. A good ICO project will have a huge increase after the listing of the token. It's worth it as long as we choose a potential project for the reward.
I agree on that,I dont think joining bounty campaign would be waste of time. A reward token from joining bounty is worth your time but finding a good ICO project is not easy.You must choose wisely the project that you think has the potential to grow and succeed.