I was under the assuption ticket credits and money from price differences was to start going into my wallet along with gift certificates. No offense but if its just going to be a feature for gift certificates, its almost a waste of time.
To me it also seems like the op is asking if theres some site like coupon mountain or something. If thats what theyre asking the answer is no. Just sign up for the newsletter and you too can get discount codes for bizarre city pairings