I think the several experiences in working with different projects has made bounty hunters very experienced. They can determine a good project from the start but some of the investors are just new and do not really determine a promising project from a scam and in the end scammers run away with their money. So bounty hunters who invest in ICOs will never invest if they do not trust the project.
In my own opinion, bounty hunters do not really understand how cryptocurrency works, most of the people who are in this industry just have a goal to earn more profit without any decent knowledge.