But I’d pin it to the “Tent Revival” missionaries movement starting in the 1820s, reaching a chaotic explosion around the 1840s which has yet to stop.
But there were also (in the US and England) theatrical science shows, exhibitions of various kinds.
Circuses and things. Industrial revolution, 1850 underground telegraph cable, beginning of mass communication and BIG movements, all prior to the Civil War.
Swindling to snake oil salesmen in the frontier, “carpet baggers” from the North (which we now call “Consultants”), invading the South after the Civil War for financial gain, all telling tales.
We don’t just tolerate fraud in America: we celebrate it.