Marketplace
I posted earlier regarding my email message with the voucher code disappearing : https://www.ozbargain.com.au/node/278324#comment-4228766
This is for the VR Shoptical $10 credit you would have received if you completed the survey for Myer VR Headset : https://www.ozbargain.com.au/node/248602 , it didnt seem to have a minimum spend and the expiry is 31st December.
The email that was sent to your ebay (and personal) email with the code seems to have disappeared for a few people as well.
If you have not used your credit yet, please check your inbox to see if the code is still there, and if it is take a screenshot! Because it might not be there tomorrow.
I did live chat to eBay and I was able to get my codes back, which I wrote down immediately. However some other people have not had luck with it and were told to send an email.