You can only get the new member $25 credit by signing up through this link. The sign up is instant, so it's a bit confusing. Once you sign up, simply hold your mouse over your name in the upper right corner. Select "refer a friend" from the drop-down and see the $25 credit you already have in the right corner!
Now, go here and claim the $25 off $50 offer! You'll instantly be given a code to use the offer! So there you go, a $25 credit and a $25 coupon code! Looks like someone needs to order at least $50 in holiday cards! :D
Once you get your code, it will expire on 11/4, but the deal may be gone before that so I'd grab this ASAP!
Looks like you have to order a minimum of 25 cards, which start at $64. Shipping starts at $7.95. Still a great deal for nice printed holiday cards!
(Thanks, Coupon Connections!)