Unlimited Express was an option, but hidden as an upgrade. Last summer, the day tickets went on sale, when my fiancee was buying tickets for our group, she called me to ask about buying the Express tickets, since they changed the name from Front of the Line. Right before she checked out to put in the payment information, a pop-up came up asking to upgrade, for extra money, to the Unlimited option. However, after a few days, they stopped the pop-up, most likely because it sold-out for that date. Now they are fully advertising them.