Update: Please note Buckscoop is saying it takes 2 to 3 months to track. You will need to remain a subscriber until payout unfortunately. So no profit.
Buckscoop is offering $52 cashback if you sign up to Amaysim's $39/month plan. Amaysim doesn't have a minimum contract or any contract, so sign up for 1 month and cancel if you want.
$52 cashback - $39.90 = $12.10 of profit plus you get an unlimited phone plan for 1 month. Great deal for anyone signing up to Amaysim.
Buckscoop is a bargain and cashback site similar to Moneybackco/Starthere. Not sure how long it will take to get the cashback. See the Buckscoop Amaysim stats page.
You may be able to get an additional 25% off of that but I'm not sure if you can combine promotional codes and cashback. You may need to check with Buckscoop or someone who may know.
To improve results in cashback, turn off ad-blocker/cookie blockers. In fact, best to use another browser or clear your cookies.
Buckscoop pays you via bank deposit or Paypal (fees apply for receiving money).
EDIT:
There is also the Amaysim flexi plan for $19.90 with $48 cashback = $28.10 profit! link
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Amaysim Unlimited Mobile:
Unlimited standard talk & text
Unlimited calls to 13 & 18 numbers
4GB data, all in Oz
Perfect for chatterboxes & socialites
Cost $39.90 a month
And some more info:
No lock-in contracts
Powered by the Optus 3G network
100% Australian-based customer service centre
Unlimited national access to Facebook, Twitter and more
SIM and micro-SIM card, also perfect for smartphones and tablets
BYO mobile, tablet or laptop
Bring your own number or choose a new one
Low international rates from 6c/min & no flagfall
FREE MONEY!