that's why you have to do an analysis of each project that you will promote, make sense or indeed fulfill the objectives for the project being developed.
if not you can choose another project to promote even if the project offers a large prize.

Yes, of course, It's like you spend your time to invest in a project despite your money. So our time is limited, that why currently we need a deep analysis before participating in a bounty campaign. There are still quality projects out of here, but they'll not allocate a large fund for hunters, it's my experience after a year in doing bounties.
Large projects will not allocate for bounties with large funds because for them it is enough with their own marketing team so the bounty program is only a little marketing that they had planned at the beginning, but if the project with failure then it will allocate high so that many are interested in me it's not enough to be followed in bounty promotions.