The normal redemption is 250 AMEX points converting into 200 JetBlue points. If you are targeted for this offer, with a transfer bonus of 40% you will be able to convert 250 American Express MR points into 280 JetBlue TrueBlue points. You will have to log into your account to see if you are targeted.
Amex 40% Transfer Bonus To Jet Blue (targeted)
Examples of Amex Cards that earn Membership Rewards points:
Were you targeted for this offer? If so, do you plan to transfer? This may be of interest for those heavy in MR points and needing a specific redemption that saves good money on JetBlue. Also interesting if you have a JetBlue Plus credit card which offers a 10% points rebate on JetBlue flights.