Looks like this is the same as the D+ deal from last September.
T&C:
Savings of 66% compared to 3 months of Disney+ Standard at the regular monthly price. Disney+ Standard only.
Valid only for new Disney+ subscribers and eligible returning Disney+ subscribers with no current active entitlement, who are New Zealand residents and 18 years of age or older.
Upon redeeming this offer, you will be enrolled in an auto-renewing monthly subscription of Disney+ Standard and you will be charged the then-current retail price (currently $14.99/month) on a monthly basis beginning at the end of your 3-month promotional offer unless you cancel your subscription before then.
Cancel anytime, effective at the end of your billing period. No refunds or credits for partial months, unless required by applicable law.
To accept this offer, create or log in to a Disney+ account, accept the Disney+ Subscriber Agreement, Privacy Policy and Collection Statement, and select the monthly offer. Valid payment method required to redeem offer.
Cannot be combined with any other offers, coupons, discounts or promotions. Not redeemable for cash or any other goods or services. Eligibility rules and offer timing may vary if you sign up through a third party billing partner.
A similar promotion is running in US for $1.99 per month. Haven't tried but VPN sign up may bring it down even further to 9.5 NZD.