It's Twitter, because otherwise the language makes no damn sense.

What do you do on Twitter? You tweet your thoughts, as individual tweets.

Like, I don't call it X, because the branding has no internal logic, I don't know the words for how to refer to things on X.

Like, what would I do on X? I would X my thoughts as individual Xes? Axises? God, can't say Axis on Twitter, you'll get FAR too many neonazis liking your Axises. And if I want to close the window for X? I'll click on the X in the top right hand corner of X -- fuck, it's so confusing!

What the fuck -- they took the most recognizable short-form blogging language on earth, branding so ubiquitous that everyone intuitively understood it and used it reflexively, and rebranded it into a pile of internally inconsistent shit.