I see it more likely that he told some lies to sell a book, and it worked.
why would he invent a past life that he never lived just for profit ?
Literally for that: Profit.
There are multiple people who have done this already, Oprah even called one out after she'd platformed him.
that seems extreme, and there is noo way that he could control people enough that eventually the truth would not be revealed
Why not? He bribed them about some childhood stories for a book, it's not a big thing.