Except, according to Bob himself, he doesn't have a "business" model. He hasn't profited off the story, and any money generated has been sent to charities.
"If Lazar is a hoaxster, as many claim, I'm hard-pressed to understand what he actually got out of this whistleblowing. He certainly hasn't profited. For the most part, Lazar has shunned the spotlight and attempted to distance himself from UFOs while coping with relentless attacks on his character and credibility."
If what he says is true and he makes zero from his claims (which I doubt) then I would say he's probably just a fantasist rather than a fraudster. Some fantasists are just mentally ill, whilst others are just insecure about their lack of achievements, but others will also make claims to try enrich themselves. Regardless of the reasoning fantasists often make claims because they just want to be a part of something or go down in history as important in some capacity. You get it quite a lot with people claiming to have been in the army especially claiming to have fought in certain wars (which is called stolen valor) or people claiming to have degrees/doctorates or qualifications they never had or earned. As people say, extraordinary claims require extraordinary evidence and that's where I lie with Bob. If this guy was privy to so much of this information then surely we would have more than just his word. If he had access to all this stuff then I'm sure he could have just as easily taken a few pictures or taken some sort of physical proof but that obviously becomes impossible if he never had access to these things in the first place.
I believe him because he simply didn't had any "changes" or "modification" with regards to how he tel his story for 3 decades straight.
He has. He even addresses this in the documentary.