I can't see there being much of a loss for the hub carriers to the SVG service. Quite a few of the regulars have their FF schemes to help maintain loyalty and the rest are price driven.
Not sure if the 737 has been refurbished inside but if it's similar to the one KLM used to run between AMS-IAH then it looks to be an underwhelming experience onboard.
Finally the pessimist inside me tells me this won't last forever, just look at the many failed all J airlines. BA are about the only one and that's running between two of the biggest financial markets in the world! Singapore airlines chopped and changed configs continually, Maxjet, SilverJet etc were all disasters. I'm sure the cringeworthy clichéd names didnae help either!