Normally, the military discounts programs on some occasions of the year. In order to know whether it is offered or not is depended on Amazon's policy sales, you can visit the store now for your reference.

To avoid this problem, you should check out carefully Amazon promo code before that promo code could be expired, some promo codes are tied to a minimum purchase, a first-time purchase, or tied to geography, and other reasons.

Usually, Coupon Stacking is not allowed at Amazon. However, the store will surely give out notice if available.

Yes, it has ever. It may not be available now, but it is completely possible for loyal customers of Amazon to get it by tracking all of its promotion programs.

All deals from Promotion Programs of Amazon are collected here. For each certain occasion, its coupons will be on the top of the coupon list, and surely they always come with an expiry date.

At the time of updating, Amazon has not applied Student Discount all year round yet. Check the official store and reach out to the customer support team to be clear.