DEAL10
Believe it or not, I only recently signed up to Catch.com.au. Today they sent me an email offering a $10 discount for orders over $40 or more. I don't know if I was targeted as a new member and it's an enticement to start buying, but the same code has been used before. So, try your luck and see if you can score a discount, too.
Expiry on the email says 21 May, but that's suspiciously the same as many Click Frenzy deals so might be in conjunction with that.