Unfortunately not on the same tier as the legendary 80 Gold Points Sifu deal, especially since Crypt of the NecroDancer frequently goes on sale for $6.00 on the Switch, but I think it's still a pretty good way to use up potentially expiring Gold Points.
Recommended process:
1) Create a new Nintendo account (If you don't already have one created after that Sifu deal.)
2) Put in all the necessary details to create an account, setting your "Country/region of residence" to Argentina.
3) On your Switch, go to System Settings > User > Add User > Create New User, then you should be able to link the accounts.
4) You may have to log into the eShop at least once with the new user profile, just to make sure the new account recognises your Switch as the primary device.
5) Insert a game cart to your Switch, press the + button, scroll down to the My Nintendo Rewards Programme > Earn Gold Points, then choose the new user profile for the points to go to.
6) When you try to buy the game, it should give you the option to use Gold Points to reduce the price. In this case, 90 Gold Points brings it down to $0.00.
Some things to be aware of:
- Gold Points can only be earned this way on physical game cards. (On digital, it's always against the account that made the purchase.)
- Gold Points can normally only be earned within a single year after the game's release. (For physical game cards.)
- The chances are not zero, but if you've neglected to redeem the points of games that are already over a year old, you're probably out of luck.
- Once they've been earned, the Gold Points will expire on the last day of the month 12 months later.
Here's the page to check if you have expiring Gold Points on your account: https://my.nintendo.com/point/expiration
So hopefully this post also works as a reminder for those with unclaimed Gold Points, as well as for those who may have extra claimed points on their Argentina account after the Sifu deal, but might not have realised that the points are going to expire soon.
Confirmed working (the game is currently downloading on my Switch) as at the time that I hit "Submit" on this post.
PLEASE NOTE!
I've specifically changed the main URL link so it goes to the Australian version of the eShop.
Hopefully reducing the chances of the Argentina version of the game getting unlisted due to being OzBargained (or at least delaying it a bit).
P.S.
Until Nov 1, Neptunia X SENRAN KAGURA: Ninja Wars (ATL of $37.50 on the Australian eShop) is also available on the Argentina eShop for 432 Gold Points.
You get 462 Gold Points for claiming points on the game carts of "full priced" games like Fire Emblem Engage, which on the Australian eShop only gives you 80 Gold Points (equivalent to $0.80).
Tried couple of times, this game is not for me.