It’s not really directly relevant to their valuation but if I can prevent someone else from that experience: DoorDash will happily let you pass your phone around a group browsing and adding things but it’s only during the actual payment attempt that they’ll deny it and inform you that you can’t order more than $50 worth of food. It was (at least at the time) documented nowhere. The app didn’t prevent you from adding more than that amount and their FAQ said nothing. Uber Eats (for better or worse) didn’t have any of those issues.