The Google Opinion Rewards app is really a good way to get free Play Store credits to go to apps, games, music, and movies just to answer some simple questionnaires and surveys.
While the credits awarded by the Google Opinion Rewards app can be quite significantly accrued, these credits expire one year after the initial award. The biggest problem is that when your credit is set to disappear, you don’t get any formal warning.
Some people received reminders to check their Opinion Rewards credit balance (via XDA-Developers), according to posts on Reddit. The original poster notes that they saw a very substantial $63 disappear from their credit balance, which is particularly strange as it would be nearly impossible to earn such a large amount in just one day of answering to surveys.
When you load the Opinion Rewards app, Google seems to display a message with a link to help center pages. The help center pages explain that while your credits are set to expire, Google is currently working on updates to help notify you.
There’s even an explanation for the huge drop seen on Reddit by posters. This seems to be due to the bulk of older credits from the Google Play Store. That still does not explain how, before being taken away, credit accumulation should reach those points.
Within your Google Play Store wallet, you can view your current promotional credit balance along with the expiry date below. It’s as simple as going to the Play Store and from the side hamburger list choosing “Payment methods.” Several commentators see the expiry date shift back within the original Reddit post when they make a purchase with their promotional balance.
Some even assert that gift card balances purchased separately disappear — which is quite shocking. We are certain that in the coming days there will be some clarification from Google about these balances.