She donated the money to some animal rights cause and then tried to say Ha-ha, I made Rush donate to animal rights.
I believe that Rush pays a (hefty) royalty to PeTA every year for the use of Back to Ohio.
Chrissie Hynde set things up so the money goes directly to PeTA. Her idea of a joke.
After all, she did write the song, and he was free to not choose it as the theme for his show.
I seem to recall the amount was $500K/yr, but someone else may know better.
That’s what she wants you to think.
Here’s the explanation from Rush himself:
https://www.youtube.com/watch?v=gZNyJ2R6WBk#t=25
and Wikipedia agrees that SHE, not Rush, donates the proceeds to PETA. https://www.youtube.com/watch?v=gZNyJ2R6WBk#t=25
But I did get some stuff wrong. Her name is Chrissy Hynde and the song is titled “Back to Ohio.”
That sounds "like a lot" but figure it out, the theme plays at the top of the hour, each hour, 3 times a show. I don't recall if the theme is also played at the bottom of the hour.
The show airs 5 time a week (sometimes even more with repeats on the weekend or time-shifted rebroadcast).
The show airs 52 weeks a year.
That is $671 per time the theme is used.
Paul Anka got rich just off the Tonight Show Theme ("Ba-dant-da-da-daaaaa") alone.