Is this an engaging and inspiring story? Yes, and it's great that people feel free to share their stories (successes and otherwise) here.
Having read it, do I have a better idea how likely this strategy is to work for any given person/company? No, and I don't know that anything short of an exhaustive longitudinal study would help there. (There's some mention of studies on creative hobbies, but it's a bit of a leap from there to repeatable ROI.)