they don't have the money if they have to pay by btc, so they pay with their own tokens which don't necessarily have good potential, so I think they are just taking advantage of bounty hunters without clear payments or what is commonly called looking for their own profit
This is exactly the situation, the project team is using bounty hunters to get bitcoins and ethereum from their investors. And they use these bitcoins and ethereum for their own purposes, which may not even be related to the project. But bounty hunters do not receive liquid cryptocurrency as payment for their work, receiving illiquid project tokens in return.