I stumbled across a few blog posts about coupon redemption today. Southern Savers explains every step of the coupon life cycle, from when it shows up in your newspaper, to when your store gets reimbursed for a redemption. If you don't know how this all works or need a refresher, it's a great post to read!
Common Sense with Money explains why manufacturer's put out high-value coupons and how they do make money from it. So when a cashier gives you a hard time for using a coupon and getting an item almost free, don't fret! You're not bankrupting them!
*The one thing I would like to emphasize after reading these two posts is that using expired coupons is not okay. I don't know of a single store in Utah that allows the use of expired manufacturer's coupons. I've also heard some stores bag their coupons up by week and send them to redemption centers. If a coupon is found in that batch that expired previous to the dates on the bag, the stores don't get reimbursed for it. We all need to be careful not to use coupons past their expiration.