The Chromecast is already a damned great little device. Pretty much 
the only thing* that would make it better is if Google randomly gave you
 free money for owning one.(*except for 5ghz WiFi support, that’d be good too.)
What do you know! That’s what they’re doing today.
As noted by Android Authority, Go
ogle is giving out $6 in Google Play credits to Chromecast owners. One catch: it seems to be U.S.-only as far as I can tell.
Redeeming the offer is super straightforward:
- Make sure you’re connected to the same network as your Chromecast.
 - Open the Chromecast iOS/Android app
 - Tap your device, then find the “Check For Offers” button (it should be hiding behind the three-dot button in the upper-right)
 - Confirm your Chromecast serial number with Google
 - Tada!
 
Some folks who own multiple Chromecasts report being able to redeem the offer once for each of their devices while using the mobile app.