10% off 10Gb data packs at Amaysim until the 20th - $90, valid 365 days.
Off the shelf you're paying $99.90 for 10 Gig of Amaysim data. Valid for 365 days. Post 10% off coupon code your paying $90. Not bad.
Only limitation is that its only applicable once, and although the dont give terms and conditions anywhere I suspect its for new customers only.