MOD: Myer Customer Service has adviced this afternoon that this offer was initially sent out only to those who are invited, i.e. targetted offer. However the code appears to be redeemable by many, but no guarantee that it would continue to work. Due to the nature of this offer, it's marked as EXPIRED, but not removed because (1) it has worked for some so not strictly a targeted offer (2) there are already 3 pages of discussions on it. However please do not link to removed vouchers/bar codes and please DO NOT tamper with the code as it would be considered as fraud.
Update: Myer have asked the deal to be removed. It's marked as expired, all links will be removed that direct to any coupon offering a discount.
Received an e-mail from Myer for $10 off in-store purchase (Minimum $10 spend, so total would come to zero) after checking the link, I figured it was a generic link that must have been sent to all e-mails and wasn't unique at all. I changed one digit on the end, and found their are several codes ($10, $20) with minimum $10.00 spends, but there are 2-3 different $20 codes that have different terms and conditions on what can be bought.
The list of exclusion of what not to by seems to be a very very, very long list. Figure out something that isn't included, and you've got you're self 3 weeks of purchasing $20 items for free :)