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.
You might be right but I could not agree with you. To run a signature campaign they do not need to be reputed. Hence they are not aware of the signature campaign, signature design, creating spreadsheets, and calculating that. If they have all the ability then their time might be more valuable than the spending on the campaign manager. If a newbie run a signature campaign and escrow their fund for few weeks then they have nothing to be worried about.
All project developers want in their campaign are leads, conversion, and branding, and who better manages here but veterans campaign managers like Royse, Hhampuz, and Brainboss who know everything around here, who are familiar with leads and conversion, and who know how to pick the right participants who are likely to deliver, who knows about sections of the forums that can deliver leads and who can establish their brand here.
I prefer veteran managers because they know how to communicate with all ranks of members here, campaign managing is not something you learn overnight, it should be backed up with years of experience, it's their territory and they know their way here.