This one is definitely a price error and partly a freebie (or at least $1)!
This morning I purchased the $2 starter sim from Woolworths. It actually scanned at $1 as a 50% off was applied.
This afternoon I've gone to activate on the website using the web browser activation at https://www.amaysim.com.au/activate/ and selected the mobile Unlimited 30GB (which is currently displaying as $10 for new customers with a bonus 50GB for the first month), entered the SIM card number, picked a number, entered my details and noticed that the cart value was $0. Had to enter my credit card details and then the service was activated.
Received an invoice which was for $30 with a $30 credit!
Hope this helps someone else out.
Didnt you get $7 cashback also?