You are right it doesn't make a lot of since. but I'll play the "Maybe this is the reason card here".
Here's one theory that won't hold water. First does Woodcraft have retail stores? This may be an enticement to get people in the area of their stores to walk in the doors. And while in there see other stuff they may purchase. A hands on approach.
While if you get a gift card and don't live in the area of a store you are more likely to stick with the limit on the card while buying off the internet or a catalog order.
And if I live far away from the store I will use the gift card (Via Internet or catalog order) even without the 10% discount.
Now if I'm getting that 10 to 20 % discount I probably spend more money. So you are right it doesn't make much since
