This is also true for all venues through Ticketmaster (which is probably over 2/3 of them). A couple years ago, they moved from static barcodes to live, rolling 2d barcodes that expire every 30 seconds. It does work pretty well to prevent duping/fraud, but it absolutely requires a phone to enter the venue.
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Some concert venues are requiring axs.com mobile app to show the ticket QR code for entry and parking. I found out after I had purchased tickets.
This is also true for all venues through Ticketmaster (which is probably over 2/3 of them). A couple years ago, they moved from static barcodes to live, rolling 2d barcodes that expire every 30 seconds. It does work pretty well to prevent duping/fraud, but it absolutely requires a phone to enter the venue.