When things went wrong—think delivery delays, order cancellations, mistakes, or extra charges—diners blamed the restaurants, ...

An unsettling number of food service workers, from DoorDash drivers to grocery clerks, can’t even afford to pay for what they sell and deliver throughout the day, let alone a cart full of groceries.

But should you tip the delivery driver? We take a look at the correct ... 21% were via a so-called "aggregator" app such as Deliveroo or Just Eat or Uber Eats, and 20% were via a restaurant ...