I think multiple copies of the DVD is why they don't say anything until you've used it more than 3 or 4 times.

People might buy 2- maybe 3 DVDs. My house has 2 copies of several movies. One for the bedroom, one for the living room. We have 3 DVDs of the Lion King ! LOL

But really more than that is going to look fishy if you aren't mailing the coupons in.

Our cashier at Blockbuster said she had about 10 of the coupon, because they let her have all the ones from the rental DVDs! Now THAT would be funny, if AG tried to cancel her orders and she actually mailed in 10+ coupons, hehe