I hate TM and ridiculous fees as much as anyone, but this article is overly hyperbolic.
There's a section named "Pirating Tickets", that just explains how to re-create a barcode that you already paid for. You're not using this to rob anyone of anything.
And at the end, "Have fun refactoring your ticket verification system". Why? There are no vulnerabilities here. A rotating barcode (even if following a known pattern) is still more secure than a static barcode on a piece of paper.
There's a section named "Pirating Tickets", that just explains how to re-create a barcode that you already paid for. You're not using this to rob anyone of anything.
And at the end, "Have fun refactoring your ticket verification system". Why? There are no vulnerabilities here. A rotating barcode (even if following a known pattern) is still more secure than a static barcode on a piece of paper.