The Erik Davis newsletter includes an "Ask Dr. D" section for paid subscribers.
It seems to me that if Robert Anton Wilson were still with us, he would have a Substack newsletter. With the help of Scott Apel, he used to have a newsletter called Trajectories. The Substack system is ideal for a writer who has a dedicated following.
We'll never know what form a RAW Substack would have taken, but I have noticed a number of Substack newsletters put out by RAW fans; here are ones that have come to my attention:
The Magnet -- I have a paid subscription to this one, done by Mark Frauenfelder of Boing Boing fame.
Burning Shore -- The Erik Davis Substack.
Octannual Manual -- The John Higgs newsletter, recently moved to Substack.
Dank Philosophy -- Dr. Richard Waterloo's newsletter. He has a work in progress about reality tunnels.
Mitch's Newsletter -- The Mitch Horowitz newsletter, with no content yet.