I think bounty managers shouldn't be blamed, how can they know, if an ICO is a scam or not. Bounty hunters have also got some responsibilities, they have to research well before participating in an ICO.
I agree! The bonus manager will not know if the ICO is cheating or not. Participants in the rewards campaign themselves need to carefully choose the right potential projects to participate in. But the bonus manager is also responsible for contacting the ICO for a proper resolution.