8. Use Amazon Shopper Panel

Another great way to earn $20 in free Amazon gift cards with minimal effort is through the Amazon Shopper Panel app. This app rewards you with gift cards for uploading pictures of your shopping receipts. Uploading 10 receipts in a month earns you a $10 Amazon gift card, totaling $120 a year. Eligible receipts must not be from Amazon, Whole Foods, or any Amazon-owned business. The app also offers short surveys for additional earnings and is very user-friendly. Currently, there's a waitlist, and the app is only available in the United States.