Had a small issue this summer on an AC flight in ExecFirst and sent an email. I honestly didn't expect a response. Not only am I not an elite member, I don't even belong to AC's programme. I'm a UA guy from over the border.
Received a nice email back and a 10% off voucher. Very nice and unexpected. Good for you, AC, to at least respond to those of us who pay to be in your premium cabin.
So I go to book a flight today and it's a very reasonable $4500 in ExecFirst and then can't find where to enter my promo code. Go back to the homepage and realize the error of my ways: should enter the promo code at the beginning of the search before prices and flights are shown.
New price using my discount promo code? $6800!

Yes, it was the difference between a Z and a full ExecFirst fare but it does not state anywhere in my email from AC that the promo code is only good on full fare flights.
I'm glad I made the mistake of pricing the ticket first before entering the "discount" code and realized by
not taking up AC's offer that I saved myself $2300.
Bad form, AC.

Thanks for the email and the "discount" code but it's in the recycling bin at this time.