An interesting comment to make from my experiences is this:
Often, when an owner of a business decides to do things the proper way, the professional way, the hard way; they end up with a cash flow intensive business that taxes margins during times of economic downswing. While, his competition, the mom and pops, who may cut corners, may not maintain a clean shop, may not spend advertising dollars, may not go to the extremes of having things like standard operating procedures manuals, comapany training syllabuses, human resources, etc. get to slide through on a wing and a prayer to exist another day.
The wannabees slap a fresh coat of message on their pig and try to duplicate what you have created. In many cases, the masses of them slow bleed your business by stealing away your potential customer base at a slightly cheaper price but a whole lot cheaper product/service. We saw this happen in the flight training business post 9/11.
I'm no expert on the dive instructor market, but maybe there was a supply and demand imbalance that was making it difficult for ProDive to draw it's core business, instructor trainees. I don't feel that the cost of fuel would be it, because the smaller shops would feel that pinch long before a popular tourist boat like ProDiveII.
It's too bad really, because some less attractive shops will benefit from the large vacuum created by ProDive's disappearance. And the area really needs a shop like that to set the bar in training, lest the bar now drop lower. It takes a business with some critical mass to set that bar in training, merchandise, and service. It will be interesting to see who steps up to the plate in Ft. Lauderdale, if any.