Hah, I've been wondering what's been wrong with my Twitter and shadowbanning could explain it. Some time ago Twitter shut down my account for "unknown reasons" and I contacted them to explain the situation and ask what the hell is going on. They never gave an answer except for "oops, our bad" and restored my account but ever since then my growth stopped completely. No new followers, no new likes from people who don't already follow me etc.
I've stopped using tags as much as I can and I try to vary the content I post, so they don't mark me as spam anymore but it's making it hard to get noticed in any way. Twitter really is terrible for unknown artists to grow. I'm gonna keep trying but it's getting a bit tiresome.
https://twitter.com/jurisaur