Same deal as this but not sure when this deal will expire
Signed up to Aussie broadband for the $99 100/40 plan reduced to $79 for the first 6 months with the code hypedup20.
Applies to 100/40 Unlimited Plans. Possibly works for 50/20.
NBN 100/40 Unlimited Plan: $99/Month ($79/Month for the first 6 months)