sku of the merchant product the user identification may need to be mapped to the merchant user identification the image servers 640 c d are dedicated to generating images corresponding to the various user requests and serving them each image server 640 c d may contain a content image handler for detecting that the user is registered with a merchant site 20 and for displaying the appropriate image and a merchant image handler for deciding which image to display at the merchant site 20 note that the images may be personalized for users and hence may be generated dynamically the click servers 640 e f handle click through which corresponds to a user directed message from the content site 10 to the merchant site 20 each click server 640 e f may contain a content click handler and a merchant click handler the content click handler routes the user click to the appropriate component such as 640 a d and 640 g the content click handler routes the user click to the user registration server 640 g for new users to the transaction management server 640 b for transactions or to the merchant site 20 if the transaction has been processed the merchant click handler routes the user request at the merchant site 20 to the appropriate component such as 640 a d or 640 g the load balancer.