You might be fascinated by the 1957 Disney Business Model diagram sent to investors: https://hbr.org/2013/05/what-makes-a-good-corporate-st https://hbr.org/201

You might be fascinated by the 1957 Disney Business Model diagram sent to investors: https://hbr.org/2013/05/what-makes-a-good-corporate-st https://hbr.org/2013/05/what-makes-a-good-corporate-st It shows exactly this, but also states that physical sales in turn become ads for their movies. Literal quote: "Music: keeps films in mind when they're out of circulation." Let It Go must be a gold mine: content for the movie, a top 10 hit song, and an ad for Frozen DVDs & toys every time a little kid annoyingly runs around singing it.