"For the up to $400 off component of the Offer the Eligible Entrant must maintain the Eligible Product for at least 60 days and the Eligible Product must be paid up to date as at 11 May 2019, being the time that this component of the Offer will be applied to the relevant policy"
Full terms & conditions:
https://www.nib.com.au/campaign-assets/master/offer/terms-an…
Watch your premium go up every year for no apparent season.