The Allman Brothers Band has discovered that TicketMaster presales supposedly limited to American Express credit card holders can actually be accessed by other credit cards. This means concert goers with a Visa, or other major credit card, can purchase tickets to the ABB’s 8/13 Jones Beach show during the TM AmEx pre-sale – or tickets to any TM AmEx pre-sale event they’re interested in. The reason behind this “dirty little secret” is that while TM technology allows them to determine the number of tix sold to a customer, seat location, event, etc it is unable to differentiate between credit card types. If you have to see it to believe it, go for it! TM’s secret isn’t a secret any more.