Just checked again & I'm now showing a $10 credit (should be $20). Four of my purchase were discounted to $1.99 due to Whispersync for voice. I don't recall anything in the terms for the promo that said those books were not valid.
EDIT: I just got the email from Audible and my account shows the full $20 credit.
Last edited by AnemicOak; 12-06-2012 at 02:04 PM.