[NSW, QLD, SA, VIC] $500 Bill Credit if you are NRMA Member($250 Gas, $250 Electricity) @ ENGIE

This deal popped up on my Facebook as advertisement.

I don’t know whether it can be combined with Shopback and Cashrewards who are both offering $112 cashback.

You will receive a one-off bonus bill credit of $250 on your first electricity bill and $250 on your first gas bill (a total of $500 for gas and electricity), provided you have not received a welcome credit from us in the past 12 months. This credit includes GST and is not redeemable for cash.