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.
One reason why they are paying the bounty hunters their own native token instead of either Bitcoin or Ethereum is that, they don't want to invest more money to marketing. They don't want to invest their own money into a token which is not sure if it will become a successful project or not. That is the reason why they are not paying thru BTC or ETH.
With the fear of dumping, yes bounty hunters are one of the dumpers but it will be a few % of the whole token value compare to the investors whose percentage is far more than what is allocated to give rewards to the bounty hunters. If you will see the allocation between the bounty hunters and investors, it is always the investors who has a highest allocation and that is why they have more chances of dumping it so the fault goes to the investors themselves. Also the team too are the ones dumping their own token for the sake of profit.
That was right dude! most bounty now a day want to pay on their own altcoin maybe they have no huge budget to pay bitcoin or ethereum but this is normal on crypto world maybe you will avoid this kind of situation by joining on bitcoin or ethereum bounty payment.