NYC also has subway stations with intense commerce, e.g. the Columbus Circle, or some bits around Herald Square. As a regular user, I find this convenient.
Almost every smaller station shows ads on walls, too, and every train carriers ads inside.
I don't see why the subway specifically could not be self-sufficient, or even a profit center. Sadly, this is not so, because of very large expenses, not because of low revenue.
Brick and mortar shopping really seems to be struggling in the US since covid, though. It’s possible some transit systems could add malls above some of their stations, but a lot of cities still have persistently high retail vacancies, and even suburban malls aren’t what they were a few decades ago.
And urban malls and chain stores are frankly often depressing — awkward layouts translated imperfectly from suburban sprawl, along with obviously underpaid and burned out staff.
Selling food works well though. I won't mind grabbing some bagels right past the turnstiles, especially if it means not standing by a food truck outside when it's cold and drizzling.
Almost every smaller station shows ads on walls, too, and every train carriers ads inside.
I don't see why the subway specifically could not be self-sufficient, or even a profit center. Sadly, this is not so, because of very large expenses, not because of low revenue.