so there's no reason to outsource parking like that (and frankly, retail makes for lousy transit anchors, since you have to carry your bags onto the subway and have your purchases lost/stolen).
Tyson's Corner Center, one of the largest malls in the United States located in Tyson's Corner, Virginia, is located right next to the WMATA Silver Line. They have a problem with "certain people" taking the train in from DC, shoplifting, and sprinting to the train to escape with their stolen goods.
WMATA, being located in DC, also has an enormous federal subsidy because of connections:

They also have enormous subsidies from the Maryland, Virginia, and DC state governments.
Of their revenue, over $80 million, or around a fifth is also not from riders:
It's not entirely fair to call all of that non-passenger revenue, as some of that is from park-and-ride garages.
$13.9 million of that is from ISPs paying to run cables along the tracks.
$10 million is from property sales to developers.
Source (Archive)
They have ~363k daily riders:
In 2022, the system had a ridership of 93,049,300, or about 362,900 per weekday as of the first quarter of 2023, making it the second-busiest heavy rail rapid transit system in the United States, in number of passenger trips, after the New York City Subway, and the fifth-busiest in North America.
Source (Archive)
The total subsidy per rider is $9264.26, or enough money to lease a car for every single rider (or buy one outright every few years). The federal subsidy per rider is $3208.32. I hope every federal taxpayer knows that they spend $3k per person to get politicians' staff, NGO employees, and lobbyists to work.
Keep these numbers in mind whenever urbanists complain about drivers being subsidized.