User blog comment:Justice Avenger/Just to kill some time! XD/@comment-5239890-20121028044012/@comment-1038387-20121028183214

I've seen people saying that works - if you purchase comics off an iPad or iPhone with comixology's app, which links the sales to your iTunes account. But what I understand with iTunes gift cards is they only work in the country they're purchased in - so, say, a Mexican iTunes gift card won't work in the American iTunes store. So I don't know if it works.