Definitely worth it if you like a G+T or 2 in the evening and you'll need plenty of bottled water too. Everything (except Coca-Cola products!) is imported, so they are expensive.
When I went to the Maldives I went AI but still had to sign for every drink as usual and the hotel prepared a bill as usual, but obviously I didn't have to pay it.
Depends if your careful with your money as some people are, it is expensive food and drinks. If you intend drinking quite a bit and like full board then yes its worth it. Your a captive ordiance in the Maldives, but it can be done on a budget.