Shout out to TightArse over at OzBargain for posting the Australian version of this deal.
Next time you're in-store, simply provide an email address to register to Mates-Rates, and you will receive a $10 coupon (via email) to spend on your next $50+ purchase.
Terms and Conditions: Offer must be redeemed by 04/03/2015 at www.dicksmith.co.nz only. Please enter your unique code at checkout. Excludes Dick Smith Commercial, Wholesale or International customers. Not to be used in conjunction with Woolworths Discount. Dick Smith reserves the right to withdraw this promotion at any time. Only 1 (one) discount is permitted and the code is single use. Excludes Prepaid Mobile Products, Calling Cards, iTunes and App Store Gift Cards, Dick Smith Gift Cards, Xbox Live and PSN Cards, and Gaming Software. Dick Smith standard terms and conditions apply. While we aim to ensure that the information in this email is correct, sometimes errors do occur for which we apologise. We reserve the right to correct any errors.
Would be handy if it stacks with the other discounts, otherwise I wouldn't bother