You can now use My Nintendo Gold Points when purchasing Nintendo Switch digital games

Gold Points are awarded based on 5% of the amount you pay. You can use the Gold Points you've earned when purchasing downloadable software and DLC for the Nintendo Switch™ system.

Using points

Apply Gold Points to select Nintendo Switch purchases during checkout on Nintendo eShop or the official Nintendo website (where available).

1 point = 1 cent (USD)

Earning points

You can earn points by purchasing eligible games and downloadable content. Points are awarded based on the amount you pay (excluding any points or discounts used).

Digital purchases - Eligible digital purchases on Nintendo.com or Nintendo eShop (Nintendo Switch, Nintendo 3DS, Wii U) 5%

Physical purchases - Nintendo Switch 1%*

*For physical purchases, points will be awarded at 1% of the Nintendo eShop price for the digital version of the game. For more on how to earn and use points, please see the Important Information section below.

For example...
If you pay $59.99 for a game on Nintendo eShop, you’ll earn 300 Gold Points.
Those points can be redeemed for $3.00 toward your next eligible purchase.

Important Information

Gold Points expire after 12 months on the last day of the month in which they were earned.
Purchases made on Nintendo eShop on Nintendo Switch, Nintendo 3DS, or Wii U, or on Nintendo.com (where available), will automatically earn Gold Points based on 5% of the total paid amount (excluding any points or discounts used).
When purchasing retail package versions of Nintendo Switch software, points will be awarded when the software is registered via the HOME Menu on Nintendo Switch.
Purchases of Nintendo 3DS or Wii U DLC do not qualify to earn Gold Points. Additionally, subscriptions, passes, in-game items, or virtual currency do not qualify to earn Gold Points.
When redeeming a download code, Gold Points will be issued automatically.
Gold Points for physical Nintendo Switch software can only be claimed within one year of the game's original release date for countries in the North American and Australian regions, and within two years for the European region.
Gold Points can be used toward eligible digital game and DLC purchases for the Nintendo Switch system, excluding passes, automatic renewals, in-game items, and virtual currency.

It's worth noting a little caveat here. Almost all launch Switch games are ineligible if they weren't already redeemed before the update. If you were holding out to redeem, it seems you're out of luck.