For the past week, i've been trying to buy a 2 year NordVPN subscription via the Cashrewards provided link. When I try to purchase with any of my credit cards via google pay i get denied by NordVPN saying I have insufficient funds. I even tried direct CC and get same respoonce. I have 1000's of credit available on my cards. NordVPN is discounted at 76% and cashrewards is offering 90% cash back (https://www.cashrewards.com.au/nordvpn).
Lessons from past deals /Comments, Nord does not have a great reputation, issues with privacy, and being sneaky to track your IP. I would suggest read some of those posts on OZbargain to make an informed decision.