I received a PM that stated that the port revenue stays on the Dutch side, and is not shared. While I have not been able to find anything that specifically states that, I have found enough anecdotal evidence to believe this to be true.

I have not been able to find what the port fee is for a Sint Maarten cruise passenger, but the Port of Sint Maarten website does have some interesting figures. In 2014, the port handled 2 Million cruise passengers for the year, setting a new record. If my $30 estimate is close, that is $60M in fees. But wow, that is A LOT of people......