Juhi, I started adding the copyright tag in April 2018 after one of our Medium peeps found a click-bait website that was using Medium content to look “legitimate.” I investigated, and found a couple of my stories (mangled, but still recognizable) on the site. Now it’s more habit than anything else. Oh, and a last chance to throw in a smart-ass remark. 😁
We’ve even found pirate copies of Deb’s books out there on the web. (40£ for a $10 — seriously?) So be cautious out there!