I don't get it. I received a ping from outside a rental car company, right on the street up from the lot. In thinking about this, I may have been physically the closest uberx to him, as I was in a parking space at the edge of the lot closest to the rental car companies. I have yet to receive a bona fide ping from an arriving passenger where the pick up can be made at arrivals or the short term lot, since uber made their 9/1 announcement.
And at DCA, yesterday, 2d time this happened, I dropped off a pax and immediately received a ping to pick up a pax also at DCA.