Summary List PlacementFor restaurants in 2020, the economic impacts of the coronavirus pandemic have upended business models and sunk revenue and profits. But for third-party delivery operators like Uber Eats, DoorDash and Grubhub, 2020 was a pretty good year. Delivery orders more than tripled, representing 10% of transactions compared to 3% two years ago, according to market research firm The NPD Group. Revenue soared and at least one delivery operator, DoorDash, briefly turned a profit during a quarter when most US restaurants were forced to rely on delivery and carryout to survive.