Free Box of Kashi !

Today I redeemed my Free Product Coupon (FPC) for a box of Kashi bars. I sent away for the "Kashi challenge" and rec'd a free sample plus coupon for a free box of choice. I stuck with the roasted almond flavour as it had a qty of 10 per box while the others only had 6. Why would I just toss aside 4 perfectly good bars?