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 seems like every project will remain a mystery, because I see a very good and successful project on ico also crashes when it's released in the market. Indeed doing a lot of different campaigns would be an advantage on its own, but it would not seem to be a major attribute to being an investor on ico.