These flyers don't require a human pilot, being piloted by the onboard software. This means that even a two seat flyer would make a viable taxi, since most taxi journeys take place with only one passenger. When you call for a taxi, using the app on your phone or by calling the company number, they will ask how many customers are travelling and because the two seaters are cheaper to run if it's just one or two people you may get a two seater. The Three Worlds Aerospace Super-Duo, being specifically designed to be cheap to run, was very popular with taxi companies and some other fleet operators.