I was updating this product and wanted to change the royalty. When I noticed no matter what number I put in they all said 0? Hopefully just a glitch? Thought I should let you know this is the link to product and if sold will actually get something? https://www.zazzle.com/red_vineyard_winery_modern_watercolor_letterhead-199931653895186085 
That’s definitely gotta be a glitch, because the retail price certainly isn’t free! Maybe they are working on updating the calculator or something?
I have about 5 of them too, and curiously all of them are 8"x4" in size. I noticed them by going through my collection at first. And at first, I was going to change my royalty, thinking something went wrong after I set me default royalty a little lower for the holidays. But, this wasn’t the case. Then I kept seeing the 40% off sale. Could this be causing something? Idk, but checked the forums to find out, and here you are! So, here are my links in case this is a bug with certain cards - or since they changed some of the paper on some cards lately. I just don’t know. https://www.zazzle.com/funny_christmas_red_green_tinsel_photo_holiday_card-256324015320550697 https://www.zazzle.com/vintage_santa_claus_custom_photo_holiday_card-256916141503519036 https://www.zazzle.com/baby_photo_our_first_merry_christmas_greeting_holiday_card-256871002555522462 https://www.zazzle.com/vintage_santa_claus_custom_photo_holiday_card-256916141503519036 https://www.zazzle.com/cute_merry_christmas_elves_rudolph_puppies_holiday_card-256585707273910029
*And a side note: Within the collection, no $ amount shows at all. Just the You save 40% under the image, as you can see in the collection view here: https://www.zazzle.com/collections/119150126695920988