Grubhub Hustles to Catch Up in Business It Once Led

Grubhub recently offered New Yorkers a deal that the online food-ordering company hoped many couldn’t refuse: free lunch.

The May promotion, which promised $15 worth of free food to people who ordered through Grubhub’s app, overwhelmed Grubhub’s system, with as many as 6,000 takeout and delivery orders coming in each minute at the peak of the promotion.