So just like how The Cheesecake Shop stores in Australia are having these $5 off vouchers, I had a look on their NZ site and figured we have them too.
Simply fill in your details and receive a $5 off voucher valid for a full year. As a bonus for signing up, you will also receive another $5 birthday voucher which will be issued every year!
Vouchers will be sent via email. To redeem, just print out the voucher and present at your store.
Credits to Nikunj from OzBargain for originally posting this.