JetBlue is offering a promotion to get more people to sign up for their TrueBlue rewards program. If you aren’t already a member and sign up and fly by June 19, 2013 you will receive 7,500 TrueBlue points.
The one caveat is that you must fly a roundtrip flight by this date, one ways will not qualify. Additionally, the terms state that you must enroll and register for this promotion prior to booking your flight. This is also only valid on paid tickets, not flights booked on an award ticket.
7,500 points is pretty fair and that can get you a free one-way flight, possibly. While one-way flights start at 5,000 points they do not have a fixed redemption program and depends on the cost of the flight, although there is no exact science to the amount of points required based on the price of the flight.
You can join the TrueBlue program and register for this promotion here.