Users can use PayPal to exchange their earnings for cash or gift cards to their preferred stores. 2. Ibotta: Ibotta is an app that offers cash back to users who shop at participating stores. By simplyhow do slots work scanning their receipts and redeeming offers within the app, users can earn cash back on a variety of purchases, including groceries, clothes, electronics, & more. 3. . Survey Junkie: This survey app compensates users for providing feedback on a range of goods and services. Every survey that a user completes earns them points that they can exchange for e-gift cards or cash through PayPal. In 4.