Hi Zulie. I've also watched your video. I'm relatively sure that I have figured out why people's stats are going down and I just wrote about it. I won't spam the link to my story in your comments.
But I do agree that it is definitely worth it to keep writing here. I believe it was one of your stories, or maybe a story by another top writer, that said that we have to adapt to Medium's changes when they happen. This last change just happened to be the most significant as far as writer stats and income are concerned.