It is entirely up to the end user as to how they will use this virtual debit card. Online shopping is a straightforward option, but Wirex is about more than that. These virtual cards provide functionality similar to an online banking account. Users can also make cheap international money transfers while paying only a small fee. In a way, the Wirex app is a modern way of banking without being a bank customer.
http://fintechist.com/wirex-unveils-free-virtual-bitcoin-debit-card-app-users/I just signed up from their mobile app for iOS and I confirm that it is working, I just ordered a USD virtual debit card and I received the details within a minute on my inbox, all you have to do is to complete the profile page first and then order the card.