two years ago, he's struggling, no follower, and i saw him bitching about his marketing skills. Now, seems he has found marketing jackpot, by shady tactics. He now has 20k followers.
Apparently he's using a bot to spam, posting some 10 message per minute, each post sent to about 14 people, with a link to programing question separate from the post, so that people who reply to the question won't see connection with his spam, and just thought a lot people like his questions.
Here's a short collection of his spam, collected from his twitter posts https://twitter.com/js_tut/with_replies This is 2019-01-02.
His CSS book, titled “Visual Dictionary of CSS”, the title is copied from my CSS tutorial, at Visual CSS, which was named “Visual Dictionary of CSS” for a while. The name is from my Visual Dictionary of Special Plane Curves project, on the web since 1997.
Apparently, he got complaints from others.
His name is Greg Sidelnikov.
Here's another complaint. If you search his name, or js_tut, you'll find some more complaints, as of 2020-06-01.