$500us or $500bze?
Are you in a full service resort, where you will use the restaurant and bar extensively along with dive or snorkel trips booked through the hotel?
And don't forget the biggie...do you have direct dial phones where you can call the US or UK without being aware of the horrendous charges
The amount of authorization a hotel obtains will usually be in proportion to the average bill of its guests....would Ramons for instance be justified in authorizing more than say Ruby's? I would say so on first impression, but then again don't have all the facts!
The less concise information you give when asking this sort of question, the greater the likely hood of impassioned responses that are inaccurate