Webcash 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. Webwhile there are some companies that claim you can make money on cash app by completing various surveys or offers, they're not usually legit. Webeveryday i go through tiktok and instagram i see people promote those $750 cashapp surveys and was wondering if it is a scam. If so, does anyone know what the scam is?.