There has been a taxi waiting park as far back as 1975, pre HAL, Ferrovial have monetised it calling it a service. The current park is on waste land, no need for shops or office building. Re Uber, HAL told them to ring fence their communications to keep drivers away, to prevent this current action, and make them pay for parking.
You can park your car nearby in the west, in the green belt, much cheaper than any service commissioned by HAL.