At this point in the evolution of internet culture, I am going with either Tumblr, 4chan or 9gag users.

The most terminally online, disconnected from the real world people.

Sure, you can be addicted to Facebook, Insta or TikTok, but those people basically /might/ know that urban dictionary exists, but the idea that /they themselves can post to it/ is unlikely to occur, due to years of addiction to /only the platform i am on matters/ ideology.

Could possibly be Twitter users but those people also seem likely to fall into the /one true social platform/ kind of thinking and fail to realize there are other intractable elements to internet websites outside of what is extremely popular.