The most important thing from bounty campaign is first we must know 100% that they will pay us and when they will pay.
without that, we should avoid this kind of bounty campaign.
In case they are keeping the tokens in an escrow, then there is a chance of the bounty hunters getting their rewards. But as far as I know, very few of the bounties do that. Then there is always the risk of the project not reaching the soft-cap level. In such case, all the efforts made by the bounty hunters may get wasted. The investors may get their money back. But for the bounty hunters, it is going to be a wasted effort.