DoorDash sent me banner notifications with coupon codes, lucrative ones like 50% off. When you click the banner the code disappears. So next time I memorize the

DoorDash sent me banner notifications with coupon codes, lucrative ones like 50% off. When you click the banner the code disappears. So next time I memorize the code, press the banner, create an order, enter the code -- and it's invalid. I immediately uninstalled the app.