We place a 365 day cookie on the computer of CD purchasers so that we can track which banner or ad referred them. This cookie tells us who the FanDoodle! is that created the so we can credit that person with the sale. We also use an IP log to make sure credit is given where credit is due. If a purchaser has clicked through the banners or ads of several FanDoodle!s the most recent FanDoodle! will get the credit for the sale.