https://wccftech.com/play-points-will-reward-you-for-spending-on-the-play-store-in-the-us/

Earlier last year, Google started testing a reward system in the Play Store called Play Points. It was available only in Japan and as of today, Google is bringing it to the United States. It is a strictly optional service and you can sign up for by heading over to the 'Play Points' section in the app's hamburger menu. You will now earn Play Points for all in-app purchases, subscriptions, movies, television shows, books, audiobooks, and music purchases. Additionally, downloading some free apps will net you some additional Play Points.

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