The issue is there aren't any viable alternatives for an MLB team right now. All they can do is really be patient and hope the economy turns around soon and they can get a new stadium built in Tampa. Unless they want to put a third team in New York or something.
Also, maybe the rays could have built their fanbase if Rick Scott hadn't turned down $2bil for that high speed rail from Orlando to Tampa.
Why would he take the only taxes his constituents pay to get jobs in the hardest hit sector of the economy in the area?