Bounty restrictions can fix few problems facing project price drop after listed on exchange,
1) if any dev want to avoid dumpers then they must limit bounty participants, the limit the participants they better ,if a bounty only request 300 participants at highest and the 300 became a dumper it won't hurt ,unlike 2000+ participants
2) devs should forget bounty when still on ICO ,allow bounties after your project finished ICO successfully and make your project is doing great before allowing bounty
This are just ideas ,if you have anything better please drop on here and let's share.
Perhaps you are right, but what is the point of doing bounty? If the reward is paid to you within a year or two. Or do not pay at all. The project will not develop. I don't think bounty will dump project tokens much. The percentage is too small compared to the total number of tokens. It usually ranges from 2 to 5%