1.6 billion? I think that the adjacent spiritual/religious concept quite probably has more than that number of adherents. The AOTC is a more technical notion (and term), which would be unfamiliar to (most of?) those adherents. I think. The adjacent spiritual/religion-adjacent concept might be a helpful route to the answer.
Governmental? No.
Associated with a particular group? For the AOTC itself, I'd say No. But the adjacent spiritual/religion-adjacent concept is certainly associated with various identified groups.

Presumably not, since you wouldn't have described it as spiritual...

Spiritualism? No.
Dowsing? No.

Corporeal? The best and least misleading answer is No. (There is a pedantic sense in which the answer is Yes, because “anything to do with” is pretty broad and vague.)