Our timeshare offered us a 4 day Carnival cruise "FREE" (and I use that term lightly) sailing out of Tampa, Port Canaveral, Mobile, Galveston or New Orleans and you pay the "port charges" of minumum $150 per person. There are different times that you can't cruise but you don't find out until you pay. You get a 1A cat. which is two bunk beds.
I am really thinking this probably isn't a good deal since you really don't know what you are getting until you pay. Has anybody else ever done a "free" cruise?