I don't know whether it made millions, but Fredrickson did write a pop-psych book based on the critical positivity ratio: Positivity: Top-Notch Research Reveals

I don't know whether it made millions, but Fredrickson did write a pop-psych book based on the critical positivity ratio: Positivity: Top-Notch Research Reveals the 3-to-1 Ratio That Will Change Your Life.