Duolingo followings

I have no idea why people follow random people on Duolingo. I get when you follow friends or someone you know, but just randomly following somebody? It's not super weird, but weird. For me. But OK, I get it, it's just for fun, out of boredom, whatever. But what is even more wild for me — then somebody decides to unfollow. What the fuck? Why did you follow in the first place? What was the thought process behind this? OK, you followed out of curiosity. But then what? There's not much happening on Duolingo. It's just progress of random people. And what? Didn't they meet the expectations? What did you expect? Every time this happens I'm puzzled.