If you have an ASUS product and register it online, you can reedem the following, no need to provide any additional payment details.
"ASUS and Adobe are working together to unleash your ultimate creative powers, with a free subscription to Adobe® Creative Cloud®, Adobe Acrobat Standard DC and Adobe Substance 3D. Join us now! By purchasing eligible ASUS products, you can receive a complimentary three-month or one-month subscription1 to Adobe Creative Cloud All Apps, Adobe Acrobat Standard DC and Adobe Substance 3D. Each subscription can only be redeemed twice by a customer."
List of eligible products are in the link and include Laptops & Desktops, Motherboards, Graphic cards, Displays and Peripherals
Marvellous…