Divorce coupons

What are divorce coupons? I don’t know. My guess is that divorce lawyers may offer discounted attorney’s fees in the form of “coupons” at the beginning of the year when the most divorces tend to occur. Is this correct or incorrect? If you know the answer to this question, please write in and let us know. Thanks.
And might they be better named “Doupons?” (Divorce + coupons = Doupons)