My question was about campaign managers (and more specific to certain campaign managers). I cannot recall when I even looked at the bounties board and would not consider them relevant as the problem would probably be at epidemic proportions there.
So you're specific about the campaign managers who handle signature campaigns and pay in Bitcoin. I don't think the managers are that stupid to enroll their alternative account in their own campaign. Usually, the signature campaign managers are reputed and run several campaigns, which is time-consuming work. I think they make some good money as well. Why would they ruin their reputation by enrolling their own account? I don't think they have enough time to operate multiple accounts. If you talk about bounty campaign managers, I think this is possible.