Hi Amy,I recently attended a 'lunch and learn' with one of our vendors where they sent us credits on GrubHub to order lunch during the event. The credits were only good for the day of the event and only sent to those who registered, but I thought this was a great way to show appreciation to their attendees.One thing I would keep in mind if you go down the route of using a third party delivery service is the cost of the credit you send attendees. You want them to be able to order at least a sandwich and a drink, so you have to take into consideration the additional cost of the service fees and tipping the driver. I think it will take away from the service if the attendee has to contribute to the cost on their own.I don't think attendees would be insulted receiving the gift as long as it covers the cost of the meal. With many of us still working remote, I think it's a nice treat to not have to worry about rushing to make lunch before the event.