Big events routinely crash their site- not just that one event but the whole site. There’s absolutely no meaningful queueing or attempt to mitigate that.
There was a time I would argue that you don’t scale your systems according to atypical demand. Like, when the mobile network used to melt at 11:55pm every New Year’s Eve – it would be stupid to build infrastructure to cope with that and have 80% of it dormant for the rest of the year.
But that was then. Today, cloud computing enables entities to spin servers up and down based on demand. It’s perfectly plausible to have multiple servers automatically power up to react to load and then shut down again to save money. With Ticketbastard it’s either incompetence or wilful obstinance.