Yet it was founded by Satanists and has even adopted the Satanic Cross as its symbol.
As I said, most people in scientology are not Satanists.
At least on the lower levels there is nothing overtly evil nor Satanic as I understand the term. Scientology specifically states that it is compatible with other religions, as it does not address God or Ultimate questions, and these issues are left to the conscience of the individual practitioner.
Hubbard was certainly associated with Alistair Crowley, perhaps the most famous Satanist of the century. And Hubbard did study at his knee, BUT 99 out of 100 scientologists are not aware of this. The bait for getting into scientology is not Satanism, it's not what they are there for.
Nearly everyone in scientology got into it because something was bugging them and nothing else they tried seemed to help. For good or evil, Hubbard, uh, 'borrowed' workable techniques from everywhere, relabeled them as his own, and organized them into a series of steps that at least initially cause very real improvements in the human condition.
People stay in scientology because for the most part it actually does work.
People tend to leave scientology when it stops working for them and/or they no longer want to go in the spiritual direction it is taking them. For some, this is when the elements of its' heritage from the Crowley crowd become clear.
So, I wouldn't say that scientology is 'high Satanism', as nearly every member would consider that they are there to battle what they perceive as the ultimate source of evil in the universe, the 'Reactive mind', or the 'Bank' as it is more commonly called. Battling evil is the antithesis of Satanism.
That is not to say that Satan is incapable of using people's good intentions for evil!
Not quite the Satanic Cross, prettl close though...