i noticed that as soon as they stopped allowing you to use the coupons on sale items (if an item was already 20% off and the coupon was for 40% off, they would refer back to the original price and do the 40%), they began to offer more coupons, but only because most of their items are already on sale, and less of a discount because they know that you can't use the bigger discount anymore!
I don't think they are in danger of going out of business, they are beginning to carry better fabrics which, even at $1 or $2 off per yard is still cheaper than the LQS - although I won't stop shopping my LQS because i like to shop at mom and pop stores and they do have better fabrics!!