Thanks, Serenity! It's always interesting to me to find out differences between all of our groups.
With my sorority, our alumnae who are considered "active" are members of organized alumnae chapters and pay annual dues to support our National Headquarters. The dues, however, are much lower as an alumna than as a collegiate, mainly because our alumnae chapters do not have as many overhead costs as the collegiate chapters.
Have a great day, everyone!