Well, I also wouldnt say its downright impossible for a campaign manager to secretly run an alt account pretending to be a genuine participant.  But it does seem pretty darn unlikely if you ask me.  Setting up and maintaining something like that would be a ton of extra work for them.  And for what - a couple extra bucks in their coffers? Doesnt seem worth the huge risk of getting caught and having their reputation shredded to bits.  Nah.  Just doesnt make much sense when theyve got so much to lose.