I just received this email regarding a flight I'm taking tomorrow:
Thanks for your continued business and loyalty to JetBlue.
It's peak travel season, and we wanted to give you a heads-up about a new benefit we're piloting for Mosaic customers and other travelers booked on your itinerary.
In the unlikely event that your JetBlue-operated flight tomorrow encounters a posted delay of two hours or more, you may opt to receive a same-day meal voucher* and an Even MoreŽ Space seat.** All you need to do is identify yourself to a JetBlue crewmember at the airport to receive this benefit.
Please note, this trial offer is only available for your flight tomorrow, and can only be fulfilled by a JetBlue crewmember at the airport.
Kind of an interesting idea, though it seems like it would be a logistical nightmare for them. And the fine print says they won't refund purchased EMS seats.