This one started today, but I went into my Optus App to get it and there was a 50% off data sim offer that stacked with the $0 Tablet.
Has to be 30gb data plan or above.
So my deal was
$12.50 x 12 Months
Tab A8 64gb 4G
30 GB Data added to my data pool
$150 total cost.
From their FAQ, I got this
Backorder and raincheck
Sometimes due to high demand stock runs out before demand does. In which case, your order might be placed on backorder or raincheck.
You may have been told you are on backorder or raincheck when you placed your order, here's some more information about the process:
Backorder: This phone's been very popular, and we're currently waiting on more stock to arrive. We can place your order and you'll be added to the queue. We can't give you a time frame for delivery yet but we'll keep you updated.
Raincheck: This phone's been really popular and we're waiting on more stock which will arrive soon. Place your order now and we'll add you to the queue. We can't give you a delivery time frame but we'll keep you updated.