if you want to join bounty that not yet listed in any exchanges, make sure to read their roadmap and whitepaper so that you know which project is good and even you received no value token after all, at least you can assure that in the future it will gain value more than what they promised on their campaign, hence, if you see it that they don't have plan to priority the listing then ignore it coz for sure it's totally shitcoin forever. So be smart enough when it comes choosing a bounty.