Am I an abnormal social media user?

I've used social media quite a while. As Twitter/X helpfully tells me when I joined, I've been on that for 18 years, and similar times on Facebook and LinkedIn - Bluesky is a recent addition. But I don't think I'm exactly normal as a user. In part I'm there because my literary agent at the time was an enthusiast and recommended using social media as a way of engaging with readers, which is my…