In addition to the coupons that you noted, Joanns has weekly specials where you do not need coupons. I buy thread there when it is 40% off.

My wife is on all the email lists and gets the coupons via email as soon as they come out. You should never go in any of the craft stores without your coupons. Also, in my area (MI), sometimes the stores, especially Michaels and Joanns, will take each other coupons. It doesn't hurt to ask. What is the worst they can do?