America Haunts is not a list. It is an organization, or association if you will of major professional Haunted Attractions. Membership is difficult to achieve, based on many factors and years often go by without any new members being added. This group and its members have been working for the good of the industry for years, and have originated or supported a huge amount of the positive media, television, events and education that have helped this industry.
Lists pop up every year from a number of sources and like a critics list of movies they are the opinions of the lists originator and often have voting components, are localized, etc. Some have been around for years and are from major media sources and thus carry more weight and some pop up overnight from nowhere.
Hope that clears up your question.