Don't participate in bounties that have low allocations, if you do so then you are just setting yourself up for disappointment when the rewards are finally paid out because you would not be getting a lot out of the bounty. If you want to make a good amount of money from bounties then you should always participate in the ones that have a high percentage of allocation for bounties
I think this has been a risk for the bounty hunters, because of the large number of participants joining the campaign, I think it is now possible to get more prizes rarely, because the ico project has split some percent in the number of their campaigns. , to be shared with all campaign participants.