The way I see this is that you could buy their cheapest plan first, $30 for 28 days and once you become their customer, you can buy any of their phones, no lock-in contracts. Phones are unlocked and ready to be used for any networks you currently have.
Massive saving for the Google Pixel 7 pro, it was $1299 and now $899. The popular Moto G54 $209 is not a bad price but not the lowest recently.
Pixel 7a 128GB $499 https://www.amaysim.com.au/devices/phones/google/google-pixe…
Pixel 7 128GB $749 https://www.amaysim.com.au/devices/phones/google/google-pixe…
Pixel 7 pro 128GB $899 https://www.amaysim.com.au/devices/phones/google/google-pixe…
Moto G54 $209 https://www.amaysim.com.au/devices/phones/motorola/motorola-…
Samsung A13 $229 https://www.amaysim.com.au/devices/phones/samsung/samsung-ga…
All of the smartphones above are 5G compatible.
$229 is way too expensive for a basic phone released 2.25 years ago.
basically you'll have no more OS update and only 2 years of security update.
Worth $150 to me.