I heard that some bounties fail to pay participants at the end of work. Considering this senerio, how can one know which bounty is a good to participate in?
I can say from my personal experience that Bounty is nothing but publicity about a project. If the target amount of fund is raised in that project then we call it successful bounty otherwise unsuccessful. And if the bounty is successful, only the payment is available from that bounty. If a bounty doesn't pay hunters even after being successful, I call it a scam bounty. So I think we should participate in well renowned bounty manager's bounty. The probability of getting paid from these bounties is high.