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.