i have no idea, but it’s not Taylor swift that’s selling those tickets for that much, it’s ticketmaster/stubhub and the like. she likely gets X amount from the venue to play there and the ticket sales all go to the venue. that’s the way it worked at the 4 day music festivals I’ve worked at. we paid the performers X amount, that had ZERO to do with how much we were charging for tickets. They got no portion of our sales.