I'm a paid Google Drive (now called Google One) subscriber. In today's "Welcome! Let's get started" intro to Google One email there was a link for a free $5 Google Play code. Check your email (and spam). YMMV.
"A little something extra
To welcome you to Google One, enjoy a $5 credit for movies, games, and more on Google Play.
$5 credit on Google Play
Good for movies, apps, games, and more"