I just do not understand why people would want to work for free without any guarantees at all. If you are really unlucky you could spend 1000s of hours doing work for these bounties and profit nothing. I am interested in hearing about your experience with these bounties and how much you profit when it comes to withdrawing the tokens.
I guess you have not yet participated in a bounty campaign where you made thousands of dollars, if you have made that kind of profit you will always look for a bounty that will give you big profit when it hit the market, I experience that on some bounty, some are paying thousands some hundreds of dollars, it's worth it if you find a good project to promote.