I struggle to think of a time when it was not so.
Da Vinci apprenticed as a painter; that is, he intended to make his living by selling his art for the dreaded "money". Other capitalist fraudsters posing as "artists" included Michaelangelo (who accepted the despised "money" for painting the Sistine Chapel!!!), Rembrandt, Degas, Picasso, and Pollack.
Then there are those charlatans of the art world whose names are forgotten to history, but they certainly accepted money for illustrating the walls of the pyramid passageways, the pages of bibles, and countless portraits of kings and courtesans.