Markets in everything

This may be old hat to a few of you, but it was news to me:

For more than 30 years, one of America’s best-kept secrets has remained a pop culture mystery. No, not Deep Throat. We’re talking about Carly Simon and her hit song You’re So Vain. Who was she singing about?
Simon says she’ll never reveal the answer, not even when she or the song’s subject dies. "I don’t see why I ever would. What would it advance?"
Well, how about fundraising?
Officially, only three people know: Simon, the ex-lover and NBC Sports president Dick Ebersol, who paid $50,000 for the answer at a charity auction. (He was sworn to secrecy.)

Here is the story.  I had always assumed it was about James Taylor, though that is a naive rather than informed opinion.