That's not it! blaming the hunter was incorrect when the project failed. But i think the problem will be with the BM and project team, because BM is the person who will be responsible for the process of bringing the project to the hunter, if the project is scam then part of the responsibility.
The manager is also not responsible. The team is the only group who could be held responsible but even they are not accountable since this is not a legally traded security. These projects are thus having all the possibility of going exit scam or just fail because you cannot sue them on any legal grounds.
This problem of non-legal securities with ICOs DeFi tokens has been well debated over and over and the consensus is that people who are taking part in them either by investing their money (investors) or investing their time/work (bounty hunters) are only responsible for their own losses.
There is nothing criminal to this on the hunters. They are taking a risk and they have their own self to blame if they waste it.