Burning Man-style ticket sale systems require a lot of extra workflow features, like a waiting room, ticket claim, raffle selection, identity confirmation. They have multiple phases of sales where the price increases. They have hardship tickets, if you can prove you simply can't afford the normal price.

Resale for above original value is not allowed, and if you're reported the ticket may be forfeit and original seller banned. You can transfer a ticket to another person using their ticket management system, and I imagine you could also "sell back" your ticket to be given away at the box office as hardship tickets.

Most people do buy as many as they can and sell or give away the extras to their friends or people on forums looking for tickets. While controversial, it is nice to go to an event with your friends, and it does feel like you're helping strangers who are interested enough that they hunt around on forums for a ticket.