You're splitting hairs between who is considered the TM client: venue or performer. Of course there may be any number of organizations between you the ticket buyer and the actual person singing and dancing onstage (venue, promoter, manager, record label, etc.).
Regardless of which of these is getting the biggest cut of the "fees", the reality is that in most cases the "fees" are line items used to increase revenue without raising ticket face prices, and TM is not the primary beneficiary.