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.
This is true, but bounty hunters often contribute to the project more than just advertising on social networks, because they become full-fledged members of the project community, in which they participate, invest their time and energy. It often happens that they know about the crypto world and about the rules according to which it exists more than investors and the project team. Many times I saw in telegrams how bounty hunters gave valuable advice to teams of different projects, to improve the project and increase its value for the whole community.