I just saw a post which suggests a few books, each suggestion has a link to the page on Amazon.
I assume by the URL that this allows tracking by the shop. The link is http://rads.stackoverflow.com/amzn/click/0130183806 and if you click it you are taken to Amazon.
So, my question is if I link to Amazon or a bookshop/computershop etc, is there a protocol to follow to show that the link originated at stackoverflow?
Dave