The rise of TicketMaster's business in the age of touring has been interesting.
One of the very last interviews Charlie Rose broadcast before his disappearance was a fascinating interview with Live Nation's CEO: https://charlierose.com/guests/12447
hmm. his site is down along with his entire show archive. That is a loss for the Internet.
Rapino talked about how Live Nation has gotten into managing artists directly, buying venues, and doing promotion and logistics for a wide array of artists at a range of scales.
It's a big change now that artist's have a direct microphone to their entire fanbase through Twitter, Instagram, etc.