Bounty payments do not have any big influence on the project. Only ICOs with a very weak team management, can allow a price drop after exchange listing. There were so much examples of hunters getting real money, without any price drops after the listing.
Exactly, ICOs are not really potential, not many investors will make ICO quickly dumped when listed on exchange. The number of tokens that bounty hunter receives is very low and is only a part of ICO's price decrease