I guess it's different for others, but to me I'm not biting.
Checked bags? I don't ever do that, can't lounge around with bags.
Other priority stuff and freebies are easily replicated on legacy carriers with low-level elite status (which I have). I suppose "refundable" award bookings might make sense, and that's the only thing that entices me. But I have tons of SW points and they are truly refundable bookings, and SW goes to more places that JetBlue.
I agree B6 hard product is good, but then you don't need to be Mosaic to enjoy that.
I'll do the match, but I don't have any B6 flights planned or even for the forseeable future. Decided to do my flying in Delta status challenge.