I was reading an article about subID's and there's a typical affiliate offer link within this image: http://profitapolis.com//images/visual-internet-marketing/encrypted subid to php redirect.gif The link in there (doesn't work) http://publishers.xy7.com/z/48632/CD3127/.$subid Why is it structured like that? Why would it be in a subdirectory called "z"? What is the next directory with "48632" ? What could that number be for? And I see that third string starting with "CD" often. What is that? (is that the affiliates unique ID?)