Yes .. No choosing a seat without paying for the upgrade. The tickets is on Jet Blue and booked as "core" no "core" seats left. You pay an upgrade charge to the next level and pick a seat but if you don't you have to roll the dice and hope for a seat assignment at the airport . You're considered stand by. I was able to just buy a ticket on the same flight the next day for about the same price as the up grade. So we get get an extra day of vacation,.