I have noticed currently Red Energy showing an increased Refer A Friend (RAF) $50 eGift Card (instead of the usual $25) until end of May 2023.
The Refer A Friend is a bonus on top of the Qantas points bonus (up to 15,000 points) that you'll received when signup with them.
Details
Refer A Friend
For every friend you refer that switches their home energy to one of our great value plans by 31 May 2023, we’ll give you both a $50 eGift Card or if you are on a Qantas Red residential energy plan the choice of 3,500 Qantas Points^.
Qantas Red Saver
Earn 10,000 bonus Qantas Points when you choose electricity
Earn 5,000 bonus Qantas Points when you choose gas
The Qantas points is ongoing product that they have offered, similar to this, this and that
Tips: to get referral, click on the ozbargain referral link
Are they good? Heard some nightmare stories on the review page