Dulles is a nice operation of Silver and runs better than Florida on most days. Also, I don't think that because Florida has full flights its more profitable. Florida has larger passenger revenue but also way higher expenses. If 24 pax are stranded in MHH or EYW for the night, the hotel cost for the passengers is way more than 24 pax stranded in PKB.

Where Silver goes from here, I have no idea, but I do wish Silver good luck!