Looks like Commbank Yello has replaced CommBank Rewards.
https://files.ozbargain.com.au/upload/449184/107984/img_0253…
Redeem with your eligible Mastercard and enjoy exclusive offers and save on Uber and Uber Eats. At the end of the offer period, the standard cost of Uber One membership, currently $9.99 per month, will apply. Cancel anytime without additional fees. Unlock with your Mastercard today.
How to claim
Tap 'Claim offer'
Claim the offer on the Uber website
At the end of the offer period, the standard cost of Uber One membership, currently $9.99 per month, will apply. Avoid incurring the charge for the next billing cycle by cancelling in app 48 hours before your billing date or contacting support. If you are currently an active Uber One member, you will only be eligible to accrue one Uber One free trial offer. Your accrued Uber One free trial offer will be viewable in the Uber One member hub. Offer valid until February 29th 2024. Active Uber One members on Mastercard funded memberships redeemed prior to 1 August 2023 will only be able to activate this offer once their current Uber One offer ends if this one is still available.
So wait till feb before activating if you already have a free membership?