I'm sorry, but I believe you are incorrect. I booked our Free Dining trip last year in April and added my mother-in-law to our reservation in July and she received the free dining. All it cost me was $285.00 to add her on, which was the cost of her hopper tickets. We already had to have two rooms because we have 4 kids, so she was put on the other room so we did not have to pay the extra fee for more than 2 adults. But if the OP has more than 2 adults in their room then they will have to pay the $10.00 per night fee, plus the cost of tickets. Also, there are a number of people on the dining board who have posted that they have added people to their Free Dining reservation this year. I do believe, that Disney policy is that you must add the person at least 72 hours before your arrival date. Hope this info helps.