There's always been a limit to the number of times you can print each coupon. I think it's two times. I believe this restriction is set by coupons.com/the distributors so everyone gets a chance to buy the item at a discounted price (instead of one person printing 100 coupons and buying 100 items).
The offer itself isn't restricted but if you run out of coupons to print, you won't be able to do the offer any more. Usually they get new coupons in a few days so you can try again then.
But, but..I was only trying to do it one time! I do it once every day. They didn't let me even do it once time. Something's really wrong lately on FC.