Actually I recently responded to a survey after my 10th cruise with Carnival which auto entered me in a chance to win a cruise, so I thought it was valid. But I got disconnected, tried to call back and no answer. Anyway, think this is a scam. Going to check with Carnival and advise them accordingly.
Just received the call and pressed one and spoke with "Lisa". I had entered a free cruise contest recently, so I was pretty pumped! Unfortunately, the line was disconnected before I could accept my award.