I believe that bounty is an opportunity to have great income in just I can say as minimal work. Technically, bounty campaign pays you for how much you work and it will bring you profit that is proportional to the ICO's success. It is very hard to be assured that the ICO will be a success but you can always check ICO rating sites or even the ICO site itself. Many of the ICO information and legibility proofs are broadcasted in those sites.