For Google Conversion tracking system , i need to place a small piece of code in the thank you page of the merchant site for this to work , is it necessary that i need to use my affiliate link in the destination url in adwords. or will it work if i place the affiliate link in my pre sell page , then redirect them to the merchant landing page through the aff link and destination url in the adwords will be my pre sell page. Please do reply Thanks in advance.