Earlier quoted context omitted.
If they're going to the trouble of pre-arranging the ride, why don't they just use cash/Venmo/Square, and keep Uber's cut of the fare?
That's what I would do with my driver. She'd arrive, and I would look up an Uber cost estimate, and then pay her cash for the average amount I was quoted. I also could ask her to run errands for me, using this same system.
What a world we live in. Most of the country (and planet) is so broke they are just scraping by, while programmers have "drivers" and personal shoppers. Wouldn't want to distract those people who have to get to work every day to figure out how to sell the poor people ads!