system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - How is it that Ticketmaster seems to have a total monopoly over all things tickets, or, why does it cost $18 to mail me tickets?

Fees that double the stated price of the ticket, huge prices for them to actually mail you the ticket - isn't capitalism supposed to work to avoid these sorts of situations?  How has this happened and, secondly, how can I avoid using Ticketmaster?
gpt
It seems like they have a near-total monopoly over the North American ticket industry because that's exactly what's happened.

Ticketmaster has exclusive deals with hundreds of major venues and most of the major concert promoters in North America (including Live Nation, the world's largest promoter, with whom they merged last year).

The short answer is, if you don't want to use Ticketmaster, you've got to boycott their shows and let the promoter and the venue know why. If they get one angry letter, they'll write it off. If they get ten thousand, they'll start to pay attention.