Bad business practices. They screwed up the reservation, were AWARE that the reservation was set for the wrong day, and not only refused to make accommodations, date changes, or refunds, but even refused to admit that they were at fault. And, after reading reviews from people who have stayed there, I feel like I dodged a bullet.
As of June 1 2015, JetBlue has began charging for all checked bags, including the first checked bag, on its lowest priced fares. All checked bags must not exceed 62 (157.48 cm) in overall dimensions (length + width + height) and cannot exceed 50 pounds (22.73 kg).
In 2010, Spirit Airlines imposed a carry-on bag fee. This year, in 2015, the only two big U.S. airline companies that do not charge a baggage fee for checked luggage are JetBlue Airways (first checked in bag free) and Southwest Airlines (which allows you to check in two pieces of luggage for free).