JetBlue has sent an email out to TrueBlue members announcing that they will cease to offer 3x for Amazon purchases on the ground — only offering 3x when connected to Fly-Fi in-flight Internet on JetBlue. It was previously possible to earn 3x on Amazon purchases starting through the JetBlue site (see: Earn 3X JetBlue Points Per Dollar Shopping on Amazon), setting it apart from most shopping portals (which only pay out in select categories).
This change is taking effect March 27, 2018. This changes the dynamic for stacking — see Extreme Stacking Amazon.com [New] for information on what still works. It’s further disappointing since I just learned that TrueBlue points can be converted to Aeroplan — a day late and a dollar short as they say, having mostly ignored this partnership in my purchases. If you have any big Amazon purchases to make and you were counting on earning JetBlue points, you’ve got about two weeks left to earn before you’ll have to make those purchases in the sky.