Here's what it has to do with it:
Satanism is about personal power. Particularly power over others.
Black Magik is quite similar and the two are often found together. So we can consider them together for purposes of comparison.
In these, philosophies lets call them, it is ok to gain power over others for your selfish desires, and methods for gaining power over others are taught and practiced.
It is not without reason that Hubbard's son said his father's religion was Black Magik, very slowly done Black Magik.
The purpose of both is power over others for your gain.
I can't argue that. Point taken!