It's a good idea to join bounties because many legit bounties are showing up and there is a bunch of scam bounty but now it's hard to find a bounty that can be included because of the size of the risky bounty as it is today.
everything becomes easy, don't think too hard. project analysis, if it's good then we do gambling by registering the campaign. if you are lucky, you will get results, but if you are not lucky, you must be patient, and look for other bounties.