Here's the T&C
Available to new subscribers only, who are UK residents (excluding Channel Islands) aged 18 or over. Subject to acceptance by Mail Plus, a division of Associated Newspapers Limited, the offer is a new generation Kindle Fire HD 7’ 8GB tablet and a twelve-month subscription to Mail Plus. Contract to provide a tablet is legally binding only when Mail Plus (or those acting on its behalf) dispatches a tablet to a customer. Prior to this, Mail Plus is under no obligation to provide a tablet and/or subscription to Mail Plus and it reserves the right to refuse or reject any order. Minimum 12-month contract applies to subscription, and shall continue thereafter, until cancelled. Subscription purchased by customer paying £119.88 immediately for 1st month of subscription and the tablet. Purchase of tablet is conditional upon purchasing subscription at the same time. Maximum 1 tablet per person, subject to availability. Offer may be withdrawn at any time. Tablet will be dispatched within 28 days of full receipt of payment. Delivery times vary. Delivery time is not guaranteed. Full Amazon Kindle terms also apply. See [insert]. Payment accepted from all major credit or debit cards. Unless notified, the subscription cost after first 12 months shall be £9.99 per month. However Mail Plus reserves the right to change the subscription price on at least 30 days’ notice to you. If you so decide, you may then terminate your subscription which will continue until the next renewal date.
So you pay £120 up front and get something worth £120... after a year it's £9.99 p/m