Many people do not understand offer and demand, how it really works.
If all bounty hunters would like to sell all their tokens (2% of total supply) it is a huge selling pressure. If there are not enough buyers, price is going down until encounters buy orders. And as you can guess, noone wants to buy ICO coins just after the ICO sale because those who wanted buy, they already bought.
Your point of view?

Bounty hunters have the right to sell their coins at any time, because they earned them honestly. If the project owners do not want to see a price dump, then let them pay the bounty hunters in Ethereum, which they received as an investment. And then there will be no problems with a price dump. How do you like this idea?
This is not the first time we have seen such offers but the meaning of the paying in ETH is not going to solve this problem. Bounty hunters don't want to hold the token they earned through bounty campaign but they want to sell as soon as possible for quick cash which they don't deserve in my opinion. The dump doesn't happened from the things like weather or the emotional shape of the bounty hunter, there are strong arguments behind every dump by the bounty hunters. As a passive income, bounty earnings distributed as a gift but this gift is locked for months. After the unlock period, I can't blame the bounty hunters for these reasons. They also need to make money.