Sign in via Facebook and send requests to friends for their addresses to receive free credit;
20 Friends = 5 free cards
50 Friends = 10 free cards
I personally only selected 20 (the people I am intending to give xmas cards to anyway, the 5 free ones will save me a bundle on international postage).
Over that I believe they are about $1.50 each? The website is quite vague… May be cheaper than AusPost $1.60 international card rate?
Merry Christmas! Here's a card with a short message and a wadding great advertisement. Love OzBargain.