Ticketmaster lacks the appropriate information defining "fastlane" tickets. A search through their help page returns no entry on the topic. The tickets themselves (and ticketmaster agents) state that the ticket can be used for General Admission Standing Room Only; however, Jones Beach "never had and does not have standing room only" (JB security associate). Ticketmaster is at fault for incorrectly labeling this ADD-ON or BONUS item as a ticket, as well as not providing any warning at all that the item cannot be used for entry.
As a disclaimer, this review does not take the show into consideration, as I was not granted entry.