It would benefit both parties so I agree to this. ICO devs should know that bounties don't really care about the project and they just work-paid-and go find another one especially the participants in their airdrop. Their rewards are so small that thinking of holding would not crossed their minds.
I agree to this. If a bounty would be paid in ETH then many bounty participants would participate in the project even if it would take a long time for the bounty to finish because they know that they would receive a coin that is already listed and they would not always bombard the telegram group with questions of when the coin is listed in exchanges because they wanted to sell their coins. It would also be an advantage to the team because they would not worry of the dumping when the tokens are distributed to the participants.