I always use the ECF coupon, and usually remember to Google for a code before buying anyway...but not always.
I think the coupon code mystique is starting to wear off. Most people know that when a stranger stumbles onto the ECF coupon code, that is likely a customer the company would not have had before. I don't think Halo is going to get offended if tons of people start making coupon purchases at all. More than likely, overall sales volume would increase.
Wes