I'm unsure what you're talking about (maybe I'm forgetting?). There is something in the NT tools that will take an amazon link and extract just the ASIN from it. It's used on item pages to help assign the correct asin to the item. But, you have to click around a bit to get to it.
Generally speaking, the site will put gametz's affiliate code into any amazon link that gets posted automatically. So, you can just not worry about it.
Ok, well, the page existed as recently as a month or two ago. I use it all the time.
Posting in the forums to generate the link doesn't work for me. It was just an easy way to quickly generate a link that I could send to clients so that it would count towards GTZ. But, if it is gone, then I'll just stop doing that. Did no benefit to me -- only you. *shrug*
I guess I must have deleted it thinking it was some old junk. I vaguely recall deleting other junk files in the server's root. It sounds like it was a standalone page that probably only you was using. Maybe, I made it 10+ years ago and just forgot about it.