Digital Gift Cards for QC - Problems with Acceptance

Anyone having problems getting the Viki Digital Rewards card accepted by your retailers or online shopping in your countries, other than US? My online stores don’t accept them as it’s issued outside my country and in US$. : (

I didn’t exchange mine yet but when I picked a gift card they converted the amount to euros

No problems here. I am in Europe, the card is American and my online website is Chinese (I think).