Google customers can now use their Play Store balance to purchase subscriptions for Play Music All Access and Play Newsstand. According to Google's Support page, the ability to use credit to purchase memberships is being restricted to just those two platforms for now, but compatibility will be added for other services in the not-too-distant future.
If you are one of the few that took advantage of the Google Play Music All Access' special introductory rate of $8, don't worry. You should be able to cancel your current payment method and reinstate the membership using your Play Store balance for the same, reduced rate, but you will need to renew your membership within thirty days of cancelling your old one — otherwise the price will bump up to $9.99.
It's possible that both these services may not be available in your country, so be sure to head on over to the Google Play Support page to see exactly what you can access in you area.
Source: Google Play Support
