Bounty is not profitable at the moment because most of the project don't achieve soft cap in token sale. Bounty allocation is so little that it can't be equals to transaction fees and withdraw fees in most of the cases.
well, you might be right. but for now, I can only help the bounty that looks pretty good in my opinion, even though there are so many ICOs that are just making money compared to the long-term development of the project. hopefully in the future bounty can be a profitable thing again.