By adding $60 to your wallet you can get an extra $10 to spend on anything else on the PSN. A code for the credit should be received before the 23rd Of December.
Instructions
Thanks to Where's_That_Cake:
You need a US PayPal to add funds to a US PSN. You cannot add funds to a US PSN with an AU PayPal. To do so you need to make a PayPal account and enter a US address. Then using your AU account transfer money over to the US account, finally moved it to your US PSN.
A US PayPal account is the only way to do this.
US. Please update title
I believe u need us psn and us paypal