Broadly the same as this deal, but with the cashback provider swapped to ShopBack and with a $10 bonus cashback quest (requires activation in the mobile app).
Maths
0.7 x $179 - $10 = $115.30.
$115.30 / 12 = an average of $9.60 per month for a year.
Random tidbits
The ShopBack quest says the purchase can be made between 18 and 24 July, but the current ShopBack cashback rates (that have been elevated to 30%) end on the 21st, so buy between now and the 21st for the best deal.
It says the bonus cashback will track separately by the end of July if you've fulfilled the conditions properly.
Activate the ShopBack quest before purchasing and consider purchasing early in case there are a limited number of quest activations.
The base price of the plan is $250 and has been discounted by Vodafone to $179. This "first party" discount expires on the 3rd of August.
You should have an idea of whether Vodafone reception in the areas you frequent is acceptable before committing to a year long plan. A plan that cannot be used is not a good deal, no matter how cheap.
If you live in the regions, Optus and Vodafone share their coverage to better team up against Telstra. You should still check your local coverage thoroughly before switching off Telstra.
If Vodafone reception is acceptable to you and you are trying to decide between Vodafone direct and Vodafone MVNOs, Vodafone direct gives you 5G. This can be a good thing if you want faster speeds, but can also be a bad thing if you have a history of poor discipline with data rationing on long term plans.



30% is the lower end of cashback for Vodafone.
wait until 22/7 and see if it will upsize to 50% or even 70%.