Usually $30 referral fee, increased to $120 until the end of year.
$120 for referrer, $120 for referee (it's paid $10 a month)
Click the random referral link in Ozbargain for an 8 character code that needs to be entered during sign-up. You can use multiple codes, for example as Commbank customer, the person signing up can get the $180 off and the referrer can still get the $120.
Dont even bother trying. The most expensive retailer I have ever used. The price is always over 0.33$. Still way expensive even after all these referrals.