Icos look for bounty hunters to promote their project through the power of social media.Sometimes, some of these hunters also double as ico investors. But it looks like bounty hunters understand ICOs project and are able to determine very good projects before they invest because of their experiences in different projects.
Not every bounty hunter is an investor for any ICO project, I think they include I will choose a good ICO project before investing because it is now too risky to invest in ICO without escrow