Spread the Love through Twitter

I just finished purchasing a t-shirt from Zazzle and at the end of the process it prompted me with:

I love the idea of telling my friends about this purchase and even promoting Zazzle because I love the shirt. What I don't like it emailing them.

What they should do is give me an opportunity to send a message to Twitter about my purchase and embed within the tweet a link that tracks me as the referrer. That way I stand a chance at getting the super-special-surprise-offer from Zazzle, and I only send a message to friends who have already opted-in from being spammed by me. Everyone wins!