Okay, I tried it out. I watched the links and cookies as I went, and you are right - the affiliation ID disappears after the first page- hopefully it is stored in their "cookie jar" on their server (at least they are doing things the correct way, unlike many (most?) sites). Let's see if this works!

I also noticed that you can enter a "discount code" after you place the order and log in as a returning customer. Perhaps perlmonks could get a code to use there as well?