This just may well be part of their marketing plan. "Give" sweet awesome stickers with every Apple purchase and the consumer will come back to purchase more gear just to get some stickers. This would also explain why they don't just sell em out right alone. Just my two cents.
why would you even throw away the box in the first place? i love the box i keep all my program backups and original boxes in it, just in case a format is needed.
Why do such a thing?? Just think, you could of made a bob or two! Loads of people buy MacBook & MacBookPro boxes, cause it's the best transport container on the market...