I cannot find this definition anywhere. Is it your personal view? Or do you have a source for it?
It is essentially the standard definition applied to a more generalized context. Generally Cult is defined in a religious nature, but Define:Cult on Google.
Is not that different.
So, yeah, I'm defining it slightly outside its common usage.
a system of religious veneration and devotion directed toward a particular figure or object.
"the cult of St. Olaf"
a relatively small group of people having religious beliefs or practices regarded by others as strange or sinister.
"a network of Satan-worshiping cults"
synonyms: sect, denomination, group, movement, church, persuasion, body, faction
"a religious cult"
a misplaced or excessive admiration for a particular person or thing.
"a cult of personality surrounding the leaders"
synonyms: obsession with, fixation on, mania for, passion for, idolization of, devotion to, worship of, veneration of
"the cult of eternal youth in Hollywood"
a person or thing that is popular or fashionable, especially among a particular section of society.
"a cult film"