Kathleen said:
However, with a Delta credit card, you get one bag allowed per person. JetBlue doesn't have that benefit with bookings made on their credit card. JetBlue is changing their credit card issuer in March from Amex to MasterCard. We'll see if they change their card benefits then or not.

I'm paying less this year than we did in 2014 on JB for March. I figure the slight increase on the ck'd-bag tier is less than other airlines charge for a bag and now I can book one with no bag for less where as before we ch'd only one bag and both paid the same fare. I think what JB has done is give a break to the guy who does only carry-on, not charge for a bag. That fee was included in the old one price fare.