A Refund is offered if a service offered has not been done, or if a product required has not been delivered.
We like to produce tangable evidence of job done. The client would be on the receiving end of any Sales, or Sign ups to a mailing list. This is not always communicated to us, though it would be nice to get feedback.
A Refund is not offered if the results are not as good as you would like. There are no guarantees where promotions are concerned. We always aim for over performance, but will not bear the loss if people do not buy into what you are selling.