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.
Part of the due diligence process of every bounty hunter is sniffing out scams and coins that are unlikely to hit their soft cap since working on those are a huge waste of time. When any novice tells me they want to invest in ICO's I tell them to do bounties first as they will get a real education on the types of risk involved with ICO's but without putting any of their capital in harms way.