I'm not sure how much of an impact this may have, but when they send out surveys they ask for your income , why you like cruising, and why you would gamble.
Lets just say they may value high income earners, that cruise primarily to enjoy the casino , and state they gamble for entertainment and not because they are an addict.
*There is a correct answer they are looking for. just tell them what they want to hear. Be interested in the onboard spend activities, bars, casino, excursions, spa, shopping ect...