1/20th of a Cent

[Iplayragstoo]

I was in line at taco bell about to place my order with a coupon for some tasty chow, when I see on the back of the coupon "Cash value 1/20th of a cent" I remember seeing this many times in the past on other coupons. Now my question is this....who is gonna "cash out" my coupons if I had enough of them? I mean what if I was able to wrangel 20K of these. Would i go inside, and ask for my 100$? I realize that this question is stupid, but so is putting that on coupons. I am sure it has some sort of legal reasons for being there, and that is my real point - What is the reason for that being there?