We all know about this problem. But that is problem for bounty hunters, not for managers and ICO teams.
They need as many participants as possible. More participants = bigger influence on social media sites.
you're right. The team spent some money and of course wanted their project to spread as much as possible, which was beneficial for their project but it was a nightmare for bounty hunters. I support limiting the number of people participating in campaigns, getting tired of only getting a few dollars after a few months.