Duelbits employs about 112 participants which would make it difficult for Hhampuz to notice
I don’t believe the number of participants had anything to do with it, even if the campaign had only five slots, with the same user the result would be the same since managers do not have a bot that notifies them if a participant changes his signature during the week.
I never understood why so many campaigns choose the same campaign manager, instead of hiring someone who's dedicated to just their campaign. It's basically like someone who only shows up for work half the time, and his boss doesn't notice it for weeks until an other employee tells on him.
I’m sure you’re aware campaigns do not only hire a manager just for his ability to deliver but for the legitimacy the manager brings to the campaign. I’m not certain a new campaign would survive if they hire a manager who doesn’t have much reputation. It will be cheaper for companies to buy copper membership and manage their campaigns by themselves but they will have to spend more time building trust within the community before they can be recognized.