If you know it's not true and you sell it, you're a con artist.
If you really believe it and try to convince others it's true, then you're proselytizing.
The end result of the latter could be good, bad or inconsequential.
I've yet to see someone apparently earnestly selling a system like $cientology who wasn't either was a psycho or they actually had (very deeply buried sometimes) misgivings about whether or not they were doing the right thing.
If you actually believe that some system you and few others are privy to has all the answers to the Questions, then you are at least to some degree psycho - because you have to shut out all the disquietening failures that you have witnessed. There is no-one who's been in the cult for any length of time who hasn't seen then ignored a whole bunch of "no results or bad results." It's a personal choice that one makes and quite consciously I believe. If you have a semi-rational being to start with.
I chose to ignore successions of evidence that the group I was part of was actually toxic and that my own "gains" weren't what I'd signed up for. And that those around me didn't "make the grade" either. My decision.
Yes there is a lot of group pressure within a cult to keep the individual believer from questioning. Yes there are a lot of fundamentally hypnotic techniques being used to convince one to keep believing. Yes there is criminal behaviour at the top that is a part of the problem. Yes Hubbard was a nasty malignant narcissist who destroyed anything He thought He needed to to keep his own scam going.
But it suits some people to go along with such a program as it fills some of their own darker desires as well as their altruistic ones. And until someone actually recognises that, they will keep themselves hypnotised - even if they recognise that Hubbard was totally bogus.
And that's why, to me, folk like Jim Logan have far more going on than just a simple mindless devotion to a dead demi-god that they still slavishly follow. His interactions on this Board before Marty's blog gave him a forum more conducive to his personal ambitions were instructive. Chase them down and review them and I think you'll see why I for one will cut him no slack in this matter.