- JetBlue launched an unlimited flying pass for $599 after Labor Day to fill empty seats in September, using only a single tweet without any traditional advertising. - The tweet went viral, driving over 800% more clicks to JetBlue's route map website in the next 24 hours as people explored where they could fly with the pass. - JetBlue sold out of the passes 36 hours before the deadline, showing the power of word-of-mouth marketing through social media.