However it originated, though, the usage of “because-noun” (and of “because-adjective” and “because-gerund”) is one of those distinctly of-the-Internet, by-the-Internet movements of language. It conveys focus (linguist Gretchen McCulloch: “It means something like ‘I’m so busy being totally absorbed by X that I don’t need to explain further, and you should know about this because it’s a completely valid incredibly important thing to be doing’”). It conveys brevity (Carey: “It has a snappy, jocular feel, with a syntactic jolt that allows long explanations to be forgone” “It has a snappy, jocular feel, with a syntactic jolt that allows long explanations to be forgone”).
But it also conveys a certain universality. When I say, for example, “The talks broke down because politics,” I’m not just describing a circumstance. I’m also describing a category. I’m making grand and yet ironized claims, announcing a situation and commenting on that situation at the same time. I’m offering an explanation and rolling my eyes — and I’m able to do it with one little word. Because variety. Because Internet. Because language.