The actual problem is, I do not even think bounties are useful for project.
Your point is on the money. Potential investors, aka suckers, are getting wise to all of these bogus projects and hopefully they'll stop giving them money. The spamming that bounty hunters do, regardless of whether its profitable for the bounty hunters or not, should not be considered to be legit work. It's just spamming, and when bounty hunters get screwed at the end of a bounty by the project devs I just laugh.
The 14-15 years old kids come to earn free money and join almost every shitty bounty in the hope of money.
Huh. You may know more about it than I do, but I didn't think most of them were that young. Then again I've read about entire families entering the spamming for money business, so I should not be surprised.