I suggest every new projects team should do this if they want to introduce bounty campaigns for their project, doing this will limit the risk for tokens losing huge value because bounty hunters sell their shares.
1. Find good bounty manager
2. Give up only few decent allocation
3. Go for strong exchanges with no fake volume
4. Accept limited participants in your bounty campaigns
5. Introduce phase distributions
Are you sure with your suggestions? Did you know that only small percentage of the total budget is allocated for bounty? Then if the value of tokens dump it blame all to the hunters who sold their rewards. Why? The success of the project is depends on the project itself and the team behind it. IF the project has a lot of support from the team with good marketing strategy that can attract and convince investors to invest on their project, I think the value of their token will recover after a dump unless after the campaign and after they get money from the investors they just let the value of their token fall forever.
I believe that OP already stated that top exchanges are important for project to get successful this days, I don't believe that serious team can release projects with no use case at all, all it takes is professional teams that are hardworking but to raise needed fund top exchanges is very important