The thing to keep in mind is that there exist things which have “circumstantial value”, meaning that the usefulness of something depends on the beholder’s circumstances at some point in time. Such an object can actually have multiple valuations, as compared to goods (which have a single, calculable market value) or sentimental objects (“priceless” to their owner).

To use an easy example, consider a sportsball ticket. Presenting it at the ballfield is redeemable for a seat to watch the game at the time and place written on the ticket. And it can be transferred – despite Ticketmaster’s best efforts – so someone else could enjoy the same. But if the ticket is unused and the game is over, then the ticket is now worthless. Or if the ticket holder doesn’t enjoy watching sportsball, their valuation of the ticket is near nil.

So to start, the coupon book is arguable “worth” $30, $0, or somewhere in between. Not everyone will use every coupon in the book. But if using just one coupon will result in a savings of at least $1, then perhaps the holder would see net-value from that deal.

That said, I’m of the opinion that if a donation directly results in me receiving something in return… that’s not a donation. It’s a sale or transaction dressed in the clothes of charity. Plus, KFC sends coupons in the mail for free anyway.