The fear of dumping often makes the project team fear or avoid the payment of hunters until sometimes after the exchange listing. I wonder why the team make themselves restless on an easy thing like that when they can easily conduct their bounty with bitcoin or ethereum for payment. That will safe them of the fear that the bounty hunter will dump after the exchange listing.
it's natural because the Bounty Hunter doesn't want to think long, after what he got he would want to immediately sell it, because what I know is that the bounty hunter wants to get immediate results from his work that sometimes months that month. different from the investors of the project who want to benefit from price increases.
Bounty hunter not lose anything. Maybe because of that, they will sell when they it is a good price. But i think some of them, or maybe a lot of them usually wait for the ICO price and maybe they can hold longer, because of reason that i mention before, they not lose anything if they hold. For me personally maybe as long some project pay bounty hunter according date that they are said, no problem for me.
Many bounty hunters don't think too much about how much or the results they get from promoting the project, so I think more bounty hunters who prefer to sell tokens that they get, indeed they don't lose anything, but if the price is very low or the tokens they have are worthless, I think they will think that what they do for weeks is a waste.