Scrimage

We are thinking of going to the Jam in the Sand event in Jamaica. Booking through the official website page, the Bahia Principe Luxury resort is $4400 for two people, which includes tickets to the event. If we book through Delta Airlines, for the same rooms same time period, the resort price is almost 50% less. Besides not having tickets, what am I missing? Can I get event tickets at the door? I don't see them for sale online.