It works that way when you order pizza online with a credit card. Since you enter the tip in advance the driver knows it. A bigger tip upfront (yes, you can st

It works that way when you order pizza online with a credit card. Since you enter the tip in advance the driver knows it. A bigger tip upfront (yes, you can still tip with cash) gets you a faster pizza, nicer service, and occasionally additional perks like extra sauces, etc.