Attributing sales to view-thrus is a new concept and hard to accept sometimes. I have learned to accept it after running several campaigns and seeing that new customers are seeing the banners, NOT CLICKING, but still coming to the site and ordering. I just don't know what percentage of sales to attribute to the view-thru. I do receive a report with all orders places by users that saw our banners (maybe they didn't see, but it was loaded on a page they were browsing). But you know, there is no way to see which ones actually saw it and were influenced by it. I am wanting to use a 40% rule. Atribute 40% of those orders to the banner view-thru. What do you think? Do you have any experience to share in relation to that? I really appreciate