If it helps, the subject line is "$10 Off Any Software Download at Amazon.com". You get a 16-character code in the e-mail.
Confirmed that it works. Been wanting to get Scrivener for a while, this gave me a good excuse.
If you have any interest at all in creative projects - novel, screenplay, comic book, NaNoWriMo (which is where I first encountered this app) - it's well worth a look.
Edited by Dreamweaver7, 14 February 2013 - 01:06 PM.