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?
You have to see the founder and team of the Bounty, sometimes many of them are fake, just want to deceive investors, overall you have to check the web and their white paper well, many things to learn in the assessment of the Bounty.
I realize a few bounties are currently successful and honest, the rest are problematic of all.
I admit it's not easy to find a good bounty, sometimes we've done some research first as you said, by checking the teams project, white paper
and social media. But still often we end up getting bad bounties, which several times the bounty I participated in paid with trash tokens,
which couldn't be sold because tokens never entered the exchange. Or even the reward tokens given are of no value, because before reward tokens
were distributed, by the teams project had been dumped first. It doesn't even guarantee that the bounty managed by a trusted bounty manager will
get a good bounty. The conclusion now is that most of the bounties circulating are bad and we really don't have high hopes for the bounty,
later we can be disappointed in the end. For me finding good bounties sometimes takes luck too.