Exclusive, and frequently draconian, arrangements with venues (and sometimes artists).

Kind of like back in the day when Intel & Microsoft imposed drastic licenses on Dell and HP that you couldn't get Windows license if you shipped ANY linux or non-windows laptops, Ticketmaster has the tremendous power of blacklisting non-conforming venues.

And then there's the REALLY SHADY stuff they do like hiring competitor executives who bring over their passwords, excels and accounts (https://www.directitcorp.com/blog/ticketmaster-caught-access... and other ridiculously wrong stuff like this https://www.cbc.ca/news/business/ticketmaster-resellers-las-... . Just start google search with "TicketMaster Caught..." and you'll find fascinating stuff that should be made up but isn't.

Basically they are a big evil bully.