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.
It still depends on the project, because they are the one who can see the potential of the project and all the latest updates, there's a big possibility that they will also invest if they see that it's going to be a long-term investment and if they have available funds too