Yes, of course. The moment you enter the signature of a business, you become part of it. You don't have the power to make decisions, but you are certainly some kind of representative. Don't the managers select the participants by selecting the best offered? Probably because the owners want the best users to represent them.

What I think is a more interesting question, is how many users actually do any research about campaign owners before applying for a sig. campaign. It's a bit disappointing when I see a user in a well-paid campaign, who doesn't even know about ANN or has never visited the website of the service they promote.
icopress started encouraging campaign participants to test the service they are promoting