I doubt the second bit is true - they will still be marking the ticket as used in their backend.
They are just trying to prevent scalpers printing off tickets 10 times and selling them outside the venues as a scam, which happened at every large concert I have ever been to until recently (so I assume this is working!).
They are just trying to prevent scalpers printing off tickets 10 times and selling them outside the venues as a scam, which happened at every large concert I have ever been to until recently (so I assume this is working!).