For Profit Subsidiaries
They also own Empire Radio in New York.
Many public radio stations operate for profit subsidiaries. Off the top of my head:
Minnesota Public Radio has a catalog business plus American Public Media.
WHYY Philadelphia rents its production and studio facilities to commercial broadcasters.
NPR rents satellite capability to commercial broadcasters.
Chicago's PBS station owns a commercial classical radio station.
Non-profit organizations are not allowed to pay dividends to shareholders. They are allowed to use "surplus" funds to pay high salaries to managers and give raises and bonuses to staff, to buy state of the art equipment, to build fancy facilities and buildings on prime real estate and to invest on for-profit enterprises. At the same time, they are allowed to go on the air and say how much they need your pledges.