Are there any store or membership cards you can put on your phone using an app like Stocard. Some retailers have apps which you can store your card onto (like Costco). Source: almost 2 years ago

Stocard - All your loyalty cards in one app. From the biggest supermarket to your local flower shop - you can add the card to Stocard. https://stocardapp.com/en/us. Source: about 2 years ago

Https://surveys.google.com/google-opinion-rewards/ This will be your most legit option. Source: 7 months ago

They have one already you only get play store credit though. Source: about 1 year ago

Since people are asking: This one? https://surveys.google.com/google-opinion-rewards/ (links to Apple and Google downloads). Source: about 1 year ago

Little trick I figured out a while ago, I answer Google Opinion Rewards every time I move around my city, which pays 10 to 75 cent on my google play balance and then can be used for youtube subscription. I get 5$ a month easy in my small City, with barely a work commute every now and then plus groceries. Easiest way to support your favorite cult. Source: about 1 year ago

This is a super oblique way to do it, but I've gotten a couple for free over the years by doing Google Opinion Rewards surveys and buying them off the Google Play store with the credits. Source: over 1 year ago