Google is currently launching Google Play gift cards but only in some countries :
https://play.google.com/intl/en-US_us/about/giftcards/


Also, the cards are physical: you receive a piece of paper!

But what about a service that would buy a bunch of those cards, that would encode all the numbers in a database and sell them for bitcoins?

It means that you could buy Google Play credits with bitcoins from anywhere in the world, without the need for a paper or anything.

Is there already something similar?