IMHO, this is the ONLY way to get Ticketmaster to revert its policy. Refusing refunds on postponements was likely a stopgap measure as the ticket sales were likely forwarded on to the venues/promoters on a rolling basis and Ticketmaster is holding insufficient funds to immediately issue blanket refunds.

I also suspect Ticketmaster does not have the manpower, nor the contractual ability to pass along a tsunami of chargeback losses on to the venues so it will raise the alarm bells very quickly if there are 100k new chargebacks this month. Not only will that freeze millions of dollars in revenues it will also cost a couple million dollars in chargeback fees.

Bonus! It also has the potential to mess with their CC processor discounts as they can get in big trouble for high chargeback numbers.

My bank refused, as their policy is to not do chargebacks for postponed events. (PayPal also denied my dispute claim.)

I've always wanted to do a chargeback!