Because there would be very little feedback from Religious Studies into other fields on what words are acceptable. There are disagreements on terminology within academia in the same sub-field (I saw this in even programming language research).
The "technical" usage is simply the normal usage of the word for anyone who mostly reads books published prior to the 1960s.
This article "“Cult” in the Study of Religion and Archaeology" in ASMA (https://www.academia.edu/5061036/Cult_in_the_Study_of_Religi...) has a pretty good discussion.
Here's an article from a text book on "Archaeology of Cult and Religion": (https://www.academia.edu/13590600/2005._Archaeology_of_Cult_...)
You can see a working usage in "A Problem Oof Definition: “Cultic” and “Comestic” Contexts in Philistia" (https://www.academia.edu/1868319/A_Problem_of_Definition_Cul...)
I haven't read the books, but there's a couple books covered in this review from AJA on the topic: https://www.ajaonline.org/book-review/619
Modern archaeology makes some odd-seeming linguistic choices to try to avoid implying more than they actually know; part of that is avoiding "religion" in favor of "ritual" and "cultic practices", because "religion" implies a whole lot of stuff that artifacts just can't see.
No: the audience is BBC article readers so the meaning is defined by that audience. The BBC is not a technical journal of archaeology, and if they want to use a technical term then they need to explain it and avoid using it in the heading. “cu*t” is wildly incorrect for the audience here.
sounds like you were in a cult
just like 'cultic practice' is used in the article which is not related to the 'New Religious Movement' meaning.
Emphasis mine. As far as I was educated this is neither the commonly understood nor academically encouraged usage.
Those two terms are synonymous. https://en.wiktionary.org/wiki/jargon#Noun
As far as "a system of religious veneration and devotion directed toward a particular figure or object"... You just described Christianity. The worship of Jesus... while that might not be what the point was supposed to have been, you might want to send a memo out. There are a lot of folks who are idolatrous to that cross.
As far as the legal definitions of cults go (under US law), well there it gets "squishy" and kind of comes down to a popularity contest, almost. "Are you of a certain age", "Are you of a certain size", "Have you a certain amount of influence", type of thing.
Yes. Christianity is, in the scholarly sense of the word intended by the article, a cult or set of cults.
Here's a priest explaining the--his words--"cult of Mary:" https://www.catholic.com/qa/what-is-the-cult-of-mary .
And here's an example of the usage from another article about late-antique Judaism: "...the Sadducees stressed the importance of the priests in the Temple cult, while the Pharisees insisted on the participation of all Jews." https://www.livius.org/articles/people/sadducees/