This is not against you directly, trust me I have my own mules but do not use them for this event because of the randomness of the event. I have my own girls as well as many kids on my list (yes I know they are little kids) who have limited time to get on. Even though the event is random, when you put in extra mules you are increasing your odds of winning over most people who are only playing with their main character It appears to be people who have several mules on who seem to be winning the most items.
To be honest, it is the ears the kids want the most. I just wish the ears were granted like the 4th of July pin, so that all would have them. That way these kids dont get left out. I am glad I have had my opportunity to grant dreams this month.