Out of curiosity, Srinivas, why are you replacing your Sunday newsletter with these articles vs. supplementing the newsletter?
Is it an email newsletter? I’d think that while there’s probably some overlap, you’d be reaching different audiences with Medium articles and a newsletter.
You could always continue the newsletter, and simply include an excerpt and link back to these posts, so that anyone who is already on your subscriber list will continue receiving your content.
Since I’m not aware of the details behind your decision, this may or may not be a helpful suggestion, but I wanted to throw it out there just in case. ☺