There is no particular $750 Cash App reward hack to speak of. However, there are ways you can potentially earn this reward without having to spend large amounts of money. These ways include signing up for subscription services and then, after receiving the $750 reward, canceling them in order to prevent further charges. With this said, such a hack requires more time and dedication on your end, since you’ve got a specific timeline in which to act and you may end up having to spend time on the phone with customer service in order to get those subscriptions canceled. It’s up to you to weigh the actual value of this “hack” in regards to the $750 Cash App offer.