[Update 7/25/17: Exclusion is back.]
JetBlue offers 3x points on almost all Amazon purchases. This is significant because most other portals only offer cash back on very select categories. JetBlue added a restriction at the start of April that prevented you from earning JetBlue points on Amazon branded gift card purchases, this exclusion is no longer found.
Now we will need to wait some time to find out if points from these purchases actually post or not, but I don’t see why JetBlue would have changed the terms if these gift cards weren’t earning points again (unless it was done by error).
Hat tip to perpetualChurner on /r/churning
