Promo codes are coming to Google Play!
With 500 codes quarterly, Google's implementation of promo codes is more generous than Apple's, which says that developers can request up to 100 promo codes for every version of their application.
For Google Play developers, the long-awaited support for promo codes is more than welcome, as these codes are a key way to get apps in the hands of early adopters, press and the media, and can be used to market applications through promotions, giveaways, and more.
Of course, because Google didn't yet offer its own official implementation for this, many developers already created their own workarounds for the problem in order to offer promo codes for upgrades and in-app content to their users.