Cloud variables are used to enforce that each unique user can only respond to the survey once. If you have already taken the survey, you will be notified when you try to submit a second time. Right now this just surveys pet preference, but I want to make it more general and allow arbitrary lists of questions and multiple choice responses. Waiting for lists and strings to be cloud variables before I enhance this more. Only having numeric cloud variables has too many restrictions.
by Barry Becker
