New TrueBlue members who join and credit their first roundtrip JetBlue flight by June 19, 2013 will receive 7500 bonus points.
The offer is valid for new members only (not surprisingly), registration is required prior to ticket purchase (“Offer not valid for previously booked flights or changes to a previously-booked flight.”), and TrueBlue number must be entered at the time of purchase. Tickets purchased as awards or with travel certificates don’t count, either.
The 7500 points are worth about $90 towards travel, which in some markets means a free one-way ticket.
Sadly this new signup bonus seems to have appeared the day after the last day to book tickets and earn quadruple points, so the two offers aren’t stackable.
(HT: The Flight Deal)