Devs should stop blaming bounty hunters for dumping ,they work hard to promote your projects and they have every right to do what they like with the tokens if this is really what you don't want then
Don't pay bounty hunters in your tokens ,pay them in USD ,USDC or ETHEREUM to avoid dumping your tokens and that will have positive impact on your tokens ,dumping will always happen and if the project is a strong one then it will quickly recover
If they only pay with tradeable coins things will look good for bounty hunters and the projects, only investors will get a hold of the coin and they are free to do whatever they want to do with although I see some campaign that pays through tradeable coins, they are very rare, if there are they become the most popular campaign.