Buying ET problem!!!

[Knitehart]

Hi, i remember there being a steam card in the usable options for ET awhile ago, so i bought a $20 steam card today, tried to go through with it but there is no option for steam card to be found....

What happened?

Or is there a specific method to use this card for DN?

[Aisuru]

I don't believe it's an option unfortunately.

[Aiko]

you have to charge it while playing the steam version and in cash shop.