Digging through Google’s news archives, I found this 1948 article from the Pittsburgh Press.
Yucatán is described here attempting to embrace tourism, attracting an intellectual set as opposed to party people.
“We don’t want horse racing and gambling casinos,” a local “leading citizen” tells the United Press reporter. “We don’t want outsiders who go far from home to lose themselves in vice. We only want intelligent people.”
Gee, Mr. Leading Citizen, I’m real flattered!
The archives reveal a number of articles that indicate press junkets (via the Pan-Am Clipper from New Orleans) designed to stimulate newspaper coverage like this. Another clipping has a reporter describing luscious Yucatecan cuisine at “Chi Cheen Itza.” The New York Times prints descriptive travel pieces about “Mayaland.”
I would guess the region’s leaders saw the beginning of the end of their golden age, with other sources of income being considered.