Up to now I have not yet earned really well on doing bounties, some of them are scam and some of them are not successful and no exchanges to get listed. It is the risk of doing this kind of things because we only invest our time and not money for this.
If you are not happy with the bounties better choose and research the best one to get the payment. Of course, we also faced the same situation with some of the bounties, after learning many things i focused on working with the IEO bounties.