It’s both.

That’s not really how the corporate world works. There’s billion dollar contracts involved that are much bigger than one artists tour. No matter how big they are. It’s use Ticketmaster, or you can’t use our venue. Full stop.

The large venues usually have an exclusivity deal with a ticket seller like Ticketmaster or AXS. So if they want to play massive stadiums, no they don’t have a choice but to use Ticketmaster. It’s on the venue, not the performer.