Wow, there's a heavy duty discussion going on about this challenge at the NDISB forum.
Being nosy and curious, I'm replying so I get a notification on the answers!
Personally I love the challenge, I think a real card is always a lot of fun to get and send, and I make not enough real cards, so it's handy too!
But, I can understand it would be a problem if you don't have a printer, or it happens to be broken or out of ink...