In unravelling the scam that Jet Blue is it's important to note the following:

Their competitors often beat them on fares, including last minute fares, see e.g. Expedia

They are largely a bait and switch operation

Otherwise, YOU have not refuted what I have said re: their cunning business decision to rip off their passengers by denying them what they spin as an incidental matter of ff miles- in case you don't know it elite major flyers often get a FREE ticket after two transcon flights (where they sat in first class)

Every day, people sit on Jet Blue flights paying as much of more as those on the majors wuthout receiving any of the benefits of being on a major (partnership points, upgrades, exotic travel)

I have nothing against Jet Blue except any savvy traveller has a duty to stop them from imposing their model on this country because I am fully familiar with the Ryanair, Easyjet European model and that is not very pretty. The CEO of Ryanair is in the paper every day thumbing his nose at his passengers who, he loves to point out, don't expect much but a rock bottom fare---By the way even the lowest advertised JB fare is not so great

It might work for you.

And they do have in-flight yoga.