[Waterproof]

I get no credit if you use the promo. I get credit if you use my link, which is not posted here.

It's probably not on their website, because it's a promo which they want to use to attract new clients that wouldn't normally go to their site... In other words, if you know about this deal, you get it. If you don't know, you get the normal deal.

Stupid example: Proflowers.com does this all the time. Enter "100" in their promo box, and you get a free vase with purchase no matter how you get to their site. Don't enter a code, and you pay for the vase.