Wow SONNYV, first an implied character flaw, now aspersions on my ethics. All in a thread in which I initially replied by complimenting you and making clear that my dissent from the opinions offered by you and Dave were intended as respectful.
Well, I think we have done away with the notion that selling/buying the coupon books is illegal. Let's look at why I don't believe that it is unethical either.
Ethics pertain to duties that we as a civilized society have to one and other. Now, by buying these coupon books, instead of earning them, no laws have been broken, nothing has been stolen from the rightful recipient, and in using the coupons the issuer has received the benefit intended by the issuance of the coupon, viz., casino coupons require that you go to the casino where RCI knows that you will probably gamble money in excess of the match play coupon, same with bingo. And, gift store and wine discounts require that you buy something in order to receive the discount. So, the issuer hasn't been deprived of anything. Now, the issuer can certainly refuse to honor the coupon if the "rules" that it has ascribed to the use of the coupons aren't followed. However, if the issuer chooses not to enforce its own rules, then a concious choice has been made by the issuer to allow their use despite the rules. Finally, people who have "earned" the coupons aren't deprived of anything that they have "earned". You still get your coupons, and you still get to use them. What ethical duty has been violated? Who has been wronged?
I think that takes care of the legal, character and ethical arguments. Next?