From website:
"20% off your first order before 29th Feb
Great news! Order or activate your amaysim SIM card before 29th Feb and choose from UNLIMITED, AS YOU GO or MOBILE BROADBAND to get 20% off your first order.
Grab a SIM online or at one of our 12,000 retailers. Offer applies to the total of your first order when you activate online. Not to be used with any other offer."
Although there may not be too many higher cost deals available to make the 20% discount worthwhile, I've been looking for a cheap, low data mobile broadband deal & came across Amaysim's 10GB data to use within 365 days for $99. Take 20% off & my order came to $79.92.
Across a year, that's $6.66/830MB per month. Only issue is downloads & uploads included. Still, should be fine for web surfing and email.
The 365 day data is a good deal, especially if you don't need to keep the same number later.