Shutterfly is offering up 10 FREE Customizable Cards when you use promo code FREE10 at checkout! It's valid on 6x8, 5x7, 5x5, 4x8 flat, 5x7 folded, 5x7 trifold, 3/4 folded or ornament, foil-stamped, glitter or pop out cards. Note that you will need to pay around $5.99 for shipping. This freebie is valid through October 23rd.