How many times I've seen big rewards Bounties end into scam,they use only big allocation to attract bounty participants to promote their project after the ICO ends they are not paying their participants and declared scam,much better to participate a project that is not giving big allocation and also a campaign that is listed already in the exchanges to avoid scam projects.
Actually bounty hunters can understand and suspect any bounty project that is indicated to be scam through the number of allocations, but I don't know why they are still forcing to join such a stupid project.
And one more thing, in my opinion, the bounty project that has a stock exchange has a smaller prize value, but it's rather than getting a scam project.