Secret Files: Tunguska is normally €9.99, but was 50% off, so €4.99. I guess it's possible that this was circumstancial and only works if a discounted game is €4.99. Or that it only applies to Europe.
Perhaps I should look through the NES games that are available on Wii U and buy one of them. It has to be something I want though, because I am not going to buy one randomly just to see if it results in gold coins.
Oh that's the reason. When having a discount the original price is what is considered. Last month I bought two games at $1 each and received my points.
Castlevania Judgment FC: 1161 - 3389 - 1512
3DS Friend Code: 3480-2746-6289
Wii Friend Code: 4268-9719-1932-3069