Club Nintendo

[Kakadu18]

theRepublic said:

Metallox said:

What you say in your first paragraph will happen sooner. eShop cards will stop working in August and, with that, it will become impossible to buy games in either system. Download codes will keep working until March of 2023. 

"Users who link their Nintendo Network ID wallet (used with Wii U and the Nintendo 3DS family of systems) with their Nintendo Account wallet (used with the Nintendo Switch family of systems) can use the shared balance to purchase content on any of these systems until late March 2023. After that, the balance can only be used to purchase content for the Nintendo Switch family of systems."

You can add money with a credit card on the Switch, and then spend it on the Wii U or 3DS shop all the way up until the shops close in 2023.  You just have to make sure your accounts are linked.  You just can't add money directly to the Wii U or 3DS shop with a credit card starting May 23 this year.

That's what I've been doing. You even get gold points from 3DS eshop purchases but you can only use them on the Switch.