They don’t need to sell millions of them to be profitable. All they need is to market them to the rich at high prices. They would not have to sell many units to make a profit.
It would come in handy on routes that experience endless traffic gridlock. A rich guy could just hop over the entire traffic congestion in a crowded city.
This reminds me of the sci-fi movies showing insane three dimensional traffic over major cities—there were several of those movies.
The special effects folks had a blast making everybody dizzy...