Gone are the days when white paper and concept are the criteria for choosing bounty / ICO, the rate of scam in the space is so much that scammers can make a wonderful white paper with a beautiful concept but once they collect investors funds, they will do exist scam, so these days, I normally join bounty through managers, there are some managers that have build good reputation in the forum and they engage with these ICO team very well to make sure that they are not scam before running their bounty.