Bounty hunters are alwasy blame for selling their tokens so quickly without waiting for the project develpment as outline in the roadmap. I don't think bounty hunters are to blame because a lot of bounty hunters hold their coins for years.
The developers should rather be blame and not the bounty Hunters because they are one who want free service. Many bounty project are out to scam investors as we have seeing over the years in the crypto currency community.