Flexi use FL3004 = ~ $14 (Save $6)
Unlimited use UNL3004 = ~ $28 (Save $12)
If you want $10 referral credit on signup, browse previous deals here for a referral link
You can use the $10 credit towards the second month making it $10 for second month of flexi or $30 for second month of unlimited
(If you want to try Amaysim, this way remains cheaper than Kogan and Aldi mobile for the first 2 months + Amaysim don't charge you a SIM or shipping fee)
Also, you can use a referral link, buy a PAYG sim for $5 which includes $5 credit and also get the $10 referral credit, then use that referral credit to add the 1GB data plan to your sim
Comments on the referral link page for AmaySIM appear closed, I'm about to join up, just need someone's referral link and MOB number to complete the process so we both get $10… Private message me first in wins. Cheers