Well they have the responsibility for the project so yes. I don't know why it is hard for them to somehow give a weekly or monthly update of what's happening in the projects and the tokens they promised in return of the jobs. Sometimes, they really give the people who invested their time in them the doubt which may lead to the "scam" idea. So please bounty managers, prove to us that the projects you are into and we invested into clearly deserve the right to become successful.