Perhaps worth noting that Chris Anderson's Long Tail theory was interesting, somewhat intuitive, and a great story ... but appears to have been pretty conclusively disproven. Instead, "product variety is likely to increase demand concentration." (Italics mine.)

https://mackinstitute.wharton.upenn.edu/2017/is-tom-cruise-threatened-an-empirical-study-of-the-impact-of-product-variety-on-demand-concentration/

cf also https://medium.com/before-the-dot/the-long-tail-when-a-famous-theory-got-almost-all-wrong-12d3c6eb0de9