the amount of bounty does not exceed 1% of the total amount of coins, in most cases. Even if all the merchant hunters sell tokens, it will not have much impact. if it's a quality item, it will respond quickly, in a few days.
I don't think every bounty hunters sell their bounty rewards, if the project is a good one, bounty hunters too hold the coin. So, it's wrong decision to blame bounty hunters for the market dump.