They are actually Live Nation which before the merger was a spin off from Clear Channel. So they have all kinds of legacy venue usage rights and exclusive contracts. It's so incredibly blatantly anti-competitive and yet the merger was allowed: Google,
Microsoft, Intel, piles of companies were against the merger.
So it's not amazing at all. And then it's perfect for many entertainers because they can use Ticketmaster as a scapegoat for such high ticket prices and exclusivity.