The whole point of having a signature campaign is to build the brand awareness. Highly respectable and reputable members make the job easier and quicker. Brand awareness and building trust are parallel thing not opposite. When you see a brand in front of you all the time, you start showing interest in it. Then you see many people you like/trust/admire is advertising the same brand, you feel confident and buy the product. It's the simple marketing psychology which applies in Signature campaign.

But for all these to be done smoothly a manager needs a flexible campaign budget. With $200 a week budget you can not do anything where even with a $1000 weekly budget you have a huge opportunity to work on the brand awareness. However an aggressive budget of a signature campaign works very well to receive a massive attention.