It has been a disaster for sim hopping ozbargainers since this new financial year.
Kogan 1c sim is gone
Boost free/profit sim is gone
and I've just found out today Amaysim no longer gives out cashback from CR & SB.
So we've to start hunting for cheap sims again.
Looks like the cheapest sim currently is Lebara (Vodafone network) for $6/30days.
This deal is not in Coles' catalog this week. But it runs frequently between Coles/WW.
Plan Info: https://www.lebara.com.au/
You may use Coles digital gift card to purchase sim cards @ Coles, but you can't use WW's gift card to purchase sim cards @ WW.
Update: As per Neoika's comment, there is a $4 pack, depending on your local store, which gives you 8GB and limited intl calls.
2nd cheapest would be Catch (optus network) $21/90 days, that's equivalent to $7/30 days
https://www.ozbargain.com.au/node/790093
https://catchconnect.com.au/home/left-image/product/63
It also runs frequently. but it doesn't come with free intl minutes, I don't like that.
You may get 3.5% cashback from CR, or I think you may use catch gift card (exchange from Prezzee) to pay for it, although I haven't tried that.
3rd option would be Belong (Telstra network) $45 100GB Starter Pack, that's $24 for 3 months, equivalent to $8/month
https://www.ozbargain.com.au/node/790418
it also doesn't come with free intl minutes
Mate is running a $1/first month promo, but their billing system is a bit funny and the website is like a Year10 student homework.
https://www.ozbargain.com.au/node/781255
I am using my very last Boost profit sim now, just bought a Lebara for August, we will see how it goes next month. :(
Customer support have responded to my email and have unlocked the SIM but now I have to pay $14.90 to purchase the 8 GB plan? It was already paid for how have they managed to mess this up twice. Won’t be using Lebara again