"one of the supervisors announced that he sincerely apologized for the delay, as this was the first day of operation for the EMB-190 and this delay was definitely not the typical Jetblue’s experience, and in order to have us back, he announced that everyone booked on B6 1004 would get a free ticket to anywhere Jetblue flies, and the mood immediately changed from dreadful to hand clapping."

Wait, so a supervisor in order to quiet an angry plane load of people after a lengthy delay promised something and now they are not honoring it?

I would call up Customer Service in SLC and voice my concern. This does not sound like Jetblue customer service.