Came across this Low Rate Card which is offering $400 cashback with $4k spend in 4 months (New cards only).
$0 First year annual card fee
$59 Annual card fee ongoing
13.74% p.a. Variable purchase rate
21.49% p.a. Variable cash advance rate
$500 Minimum credit limit
$30,000 p.a. Minimum income required
For the rest of the info and T&Cs visit: https://www.westpac.com.au/personal-banking/credit-cards/low...