AA is not a corporation. AA has no leadership. AA is completely voluntary. AA is ANONYMOUS. AA has no membership records. AA neither keeps records of, nor reports, "success". The concept of "success" is never spoken, never defined.
AA groups live off donations for small items like providing coffee and paying a small amount to those organizations who host meetings for lighting and cleaning. No one in AA is required to donate. Some small fraction of donations are supplied to maintain a "central office" that sources AA publications, keeps records of where meetings are held, runs a copy machine, develops social events, etc.
AA is not a religion, but structures itself around Christianity. There are no sermons, and most don't follow the Twelve Steps. I personally don't follow the religious aspects and no one has ever questioned me about it.
The central tenet of AA is "one day at a time". That is, when I wake up in the morning, I say out loud "I will not drink today". I go to meetings when I can simply to be with other struggling alcoholics. If I need help, I can ask for a "sponsor" who is available 24x7x52 for support. A sponsor costs me nothing. AA members are alcoholics, and we freely admit that we have no control over alcohol and must make a commitment to ourselves to be sober "one day at a time" .
AA is present in essentially every town and city in the US. AA's membership is unknown, even to AA, but my guess that nationwide there are at least several million persons who attend AA meetings regularly.
AA membership encompasses the entirety of society. There are two early morning meetings in my city, sponsored by two hospitals in their main theaters, that are attended by physicians, surgeons, nurses, attorneys, judges, police personnel, elected officials, and more. Attendance at these two meetings are 200-400 each morning, by my personal estimates. There are some 250 other meetings every day in my local area of 300,000 population.
I bring this up because anyone who remotely thinks that AA will close through any kind of government edict will be chasing ghosts, to be frank. AA does what is does, and that is all that it does. "...it works if YOU work it."