Kudos? She benefits financially from this little virtue signal.
First she's going to pick up some new fans that will buy her music, plus the publicity also has monetary value to her. And secondly, because she donated the proceeds of the sale of the car to NPR, she gets to write off the donation from her taxes to benefit financially yet again. Nor does she need to worry about someone vandalizing her property, which would cost her money to repair.
Just another profitable day for a person with a $70 million net worth.