All of those do count, but many people have a narrower definition because of how the term "social media" is often shorthand for Twitter, FB, IG, and similar when used in the traditional media.

My point is that if you want to ban something then you need a specific dividing line other than "like Twitter." Otherwise either everything is banned or nothing is banned since everyone just uses loopholes. And if everything is banned you better be sure you actually want everything banned.