Can I combine a discount code with a holiday promotion? Steph August 02, 2019 20:31 Updated Follow Nope. Our discounts don’t stack. If used on already-discounted items, we reserve the right to void the sale. Related articles Can I use my discount code on an already discounted product? Do you offer military discounts? How do I apply a discount code? Does Kammok offer discounts? Do I have to pay sales tax? Comments 0 comments Please sign in to leave a comment.