Jetblue is a distant third at FLL, one or two international flights isn't going to dent Spirit's FLL dominance.
Good Luck to them deplaning their passengers and then towing their aircraft to other terminals for departure.
US Air tried that on a much larger scale. How did that work out?
For year ending Oct 08
Spirit 1.47 million pax out of FLL
Jetblue 1.41 million
not what I would call a distant third.