Got one last weekend at the Orleans. You have to gamble a few points and than you go to the machine by the awards booth. A birthday banner appears and you select one of 5 or 6 balloons. I got a $25 meal credit, but forgot to check out what the rest were. Nothing at Sams Town and didn't make it to Suncoast.
BTW great hits for you guys on this. My wife and I always hit the 1-2000 points balloon which is only $1-$2. My MIL did get one for a $5 food credit tho-seems alot of people from previous posts get the booby prize as us.