Not sure what this has to do with anything? The restaurants that sell photos, set up the photo op before you are seated, and they have nothing to do with the characters. Chef Mickey's, Tusker House, 1900 PF, 'Ohana and CRT are done in front of either wooden or scenic backdrops, or, characters who do not go around to the tables during your meal. There is no way for the character handlers to know who has purchased a photo package as CMs come to your table, during your meal, and try and sell the package. One has nothing to do with the other. Characters are rotated throughout the restaurant on a schedule, that has nothing to do with whether or not guests have purchased additional photo packages or not.
HTH, Tiger