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Looks like you'll soon be able to buy gift cards for the Google Play Store. of the upcoming vouchers, and Android Police , finding not only gift card support, but a new wish list feature as well.
Improving the Play Store is a smart move. Anything that makes the Android ecosystem more attractive brings in more developers and more competition to make the best apps, which leads to a better value for Android users. I'll let this out-of-context quotation from Steve Ballmer illustrate my point:
(And yeah, I know it's pretty old. Still funny.)
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