sale at vistaprint

I'm making my save the dates (late, I know) and I came across this on retailmenot:

50% OFF SALE + FREE SHIPPING ON $50+ SALE EXCLUSIVE
Vistaprint: RetailMeNot Exclusive! Save Up to 50% Off Most Products + Get Free Shipping on Orders Over $50. Also check out the 40% heavier business card stock that is sturdier, sharper, smoother and 0% more money.

It's working on STD magnets. I am not sure how it works: I clicked on it, went back to my same vistaprint page, and the discounts were showing.

I will upload my STD in a few minutes.