The impact of bounty hunters on the price depends on the size of the pool of bounty tokens. Mostly it's a combination of Bounty hunters and huge bonuses at pre-sales that can hurt the price of the token the most.
Yes, but that's mostly just a problem in the beginning. After bounty hunters dumped their coin the price will go to an natural price regarding their supply and demand.
You are right. If it's a solid project and the devs can constantly deliver, the price will recover. But people who invest in an ICO and see that the token is trading below the initial price, will in the future think twice about investing in an ICO again.