Well, right now you can order $99.99, and get free shipping without using a code. You can use your credit but the net amount needs to be above $99.99 to get the free shipping, but both can be used.
So you see, we do listen....
Of course, you can't combine multiple discounts like the 15% new customer discount and then a 25% discount we do for members....and then my store credit and the 15% new customer discount and the Free Shipping store...At some point, we'd be paying you! But remember, you can always choose the offer that is most advantageous to you....
Scott