Almost all the senior members stayed with Mary-Ann De Grimston, the Oracle (and leader) of The Process, and they helped her reorganise her cult as The Foundation Church of the Millennium. Which became The Foundation Faith of God. And eventually morphed into Best Friends, a beautiful animal sanctuary for unwanted pets in southern Utah.
After the Schism a number of more junior people followed her soon-to-be-ex husband Robert for a while. And over the years, there were various half-baked efforts to revive The Process (which was always spelt with a capital T for The). However, those of us involved in those attempts had little more than nostalgia and longing to fuel us, not the deeper training nor the sense of spiritual contact that made it all happen the first time.
There's a second community out there of people who believe The Process was a dark and powerful conspiracy of death, or who want or need to believe that. A few of these individuals, who apparently thrive on their own paranoia, persist in this. What I'm posting here might be of interest to them, but I doubt it.
I can only tell of my own involvement, which was as a hanger-on for about three years, then an Outside Processean for a year or more, and an Inside Processean for almost another year after that. I was close enough to the second rank of leadership to observe the feet of clay, and enough of a believer to have had a long, bad crash when the disillusionment set in. Deprogramming some aspects of the experience took me 20 years or more, and I hope I've helped a couple of other people go through that in the years since.
At the same time, I have to acknowledge that parts of my experience in The Process were a blast. I had some soul-shaking realisations in the early phases, and made one or two friendships that have lasted (gulp) almost 40 years. Whatever failings or deceptions I recount here - and there are many to tell about - I will always acknowledge that The Process helped me understand a few things about living that, at the time, nothing else could have done. I have a beef with the way the people at Best Friends gloss over their past, but not with any of them personally.
My involvement in the cult was two decades before Thelema remotely attracted me, so anyone looking to tie The Process to occult activity through this site is going to be disappointed. I have no tales of magical rituals to recount, nor, to my great disappointment, did I hear about any when I became an insider. The Process was a psycho-spiritual cult, practising a tightly woven system of introspection that it stole or adapted primarily from Alfred Adler's Individual Psychology (this provided the early conceptual framework) and L. Ron Hubbard's Scientology (which provide the methodology and the basis of the spiritual perspective). Although The Process stressed telepathy and psychism, it never practised formal invocation, or such things as pentagram and hexagram rituals; nor did it work with spirits or angels in any systematic way. Its Goddess was Mary-Ann, Robert was its Messiah-in-Waiting; with divinity incarnate at its centre, it saw no need to call on other forces.
Which is probably a pity, given how things turned out. But that's how it went.