Bounty tokens and coins can turn useless very fast once trading starts on exchanges and this is because the project isn't good enough, the project has too low demand in Crypto space and that's a big red flag
The exchange site will determine what will be the best price that to be valued for the project and this is depending on the how big achievement that can be achieved by the developers during the development progress.
The hunters were selecting the good coins to be on their portfolios. What you have been saying also the main reason why hunters dumping their tokens.