You can look up the original, circa 1992, definition of "fake news" over VNR/ADR (video/audio news releases), effectively commercial propaganda:
Barbara Lippert, "General Foods Maxwell House Coffee: For Maxwell House, Ellerbee Doesn't Quite Perk", Adweek, May 22, 1989.
Ed Buxton, "Ad Simulations Require Honesty to Reach Audiences", Ad Day, August 22, 1989
Darren Bosik, "TV Guide attack on VNRs is cheap shot, say video pros", O'Dwyer's PR Services Report, April, 1992.
PRSC developing set of standards codes for VNRs, O'Dwyer's PR Services Report, June 1992, page 46.
Darren Bosik, "Success of 'rotten' VNR told at seminar", O'Dwyer's PR Services Report, August, 1992.
"TV Guide calls VNRs 'fake news,' again", O'Dwyer's PR Services Report, April 1993, page 10.
Darren Bosik, "Video producers debate need for VNR ethics code", O'Dwyer's PR Services Report, April 1993, page 1.
Greg Hazley, "Ethics questioned, VNR pros sound off", O'Dwyer's PR Services Report, April 2004, page 1.
"Fake news is bad news for PR biz", Advertising Age, January 17, 2005, page 16.
Jim Cameron, "PR & Media: The Perfect Ethical Storm" O'Dwyers PR Daily, June 2, 2005. (Sub req'd).
https://www.sourcewatch.org/index.php?title=Fake_news
Or 1950s quiz show and payola scandals:
The American quiz show scandals of the 1950s were a series of revelations that contestants of several popular television quiz shows were secretly given assistance by the show's producers to arrange the outcome of an ostensibly fair competition. The quiz show scandals were driven by a variety of reasons. Some of those reasons included the drive for financial gain, the willingness of contestants to "play along" with the assistance, and the lack of then-current regulations prohibiting the rigging of game shows.[1]
https://en.wikipedia.org/wiki/1950s_quiz_show_scandals
Prosecution for payola in the 1950s was in part a reaction of the traditional music establishment against newcomers.[5] Hit radio was a threat to the wages of song-pluggers.[4] Radio hits also threatened old revenue streams; for example, by the middle of the 1940s, three-quarters of the records produced in the USA went into jukeboxes.[5] Still, in the 1950s, independent record companies or music publishers frequently used payola to promote rock and roll on American radio; it promoted cultural diversity and disc jockeys were less inclined to indulge their own personal and racial biases.[6]
https://en.wikipedia.org/wiki/Payola
Or yellow journalism
https://en.wikipedia.org/wiki/Yellow_journalism
The trend arises from time to time, throughout history.
It's countered by notions of journalistic professionalism, e.g., Walter Lippmann's Public Opinion:
https://en.wikipedia.org/wiki/Public_Opinion_(book)