She's a billionaire. I doubt she even cares, but who knows. I think there's more a psychological thing at play here. It's clear a lot of people loved her work and feel hurt and betrayed that she became who she is. If she was just some other billionaire that was vocally anti-trans it wouldn't be so painful. As a 'cis male' who was never into her books I can't really relate, but there' a clearly a large community of former fans who it has affected.