Hey! Here's a tip when ordering wedding invitation samples - order free samples from David's Bridal even if you have no intention of ordering your invitations from them. I didn't like any of their designs but was curious about their quality, and I figured they were free so why not?
A few days after placing my order I received a promo code for a free 8x8 photo book from Shutterfly. A free gift for ordering something free! How great is that!
Not sure if that's always something they do, or if it was a limited-time thing, but it's worth a shot.