Webcash app does market research and giveaways, but cash app will never ask you to fill out a survey that promises money or other rewards in exchange for your personal. Webmar 25, 2024ย ยท cash app is not giving away $750, but flash rewards gives people a chance to earn up to $750 in gift card rewards or cash app or paypal deposits by. Webmay 24, 2024ย ยท while there are some companies that claim you can make money on cash app by completing various surveys or offers, they're not usually legit.