It is very difficult to choose and to tell which bounty campaign is good and which bounty is a scam. I have joined a bounty campaign which I did for 2 months only to find out that it is a scam. I joined two scammed bounty campaigns which I really studied very carefully before joining, which is very unfortunate of me. But to be able to choose a good bounty, it is best to check their website, their whitepaper, its roadmap and if they have a working project or a project that is have a prospect in the future. It is also important to check the bounty managers handling these and if they are responsive everytime we have queries.