We wanted to alert you to a change that will be coming in v1.6.0 on 6/23/2011 around 2am:
Coupons will now apply to the total of all charges, instead of just the base fee. This means that any setup fees and component charges will also be discounted by a valid coupon.
All of the feedback we have gotten about coupons is that they should apply to all of the charges, not just the base charge. So, this will be a welcome change for most of you, but a change about which you should be aware.