Woke up this morning and it appears as my 16gb plan has been upgraded to 17gb. 23GB plan has been upgraded to 32GB. Other plans (3gb and 7gb) appear to not have received an upgrade.
For existing customers
Up to 40% off Unlimited Prepaid 90/365 Day SIM Plans @ Kogan Mobile
Note: Existing customers on the 23GB plan will have to wait a while to get the upgrade. Thanks Blue2609