In my opinion, one of the most critical things you must do to gain more followers on Steemit is to produce and gather quality posts regularly. Second to that, it is essential to talk about how SEO optimization of rich and valuable content that readers can find interesting and informative is also important. Take the time to develop your writing skills, and try to post a range of different approaches to your articles – adding pictures, videos, or even infographics.

This paragraph is a bit of a giveaway too.

This stands out:

Take the time to develop your writing skills

Whereas an author would say "I'd like to develop my writing skills". Similarly:

try to post a range of different approaches to your articles

Again, language is important.

If you go back to his old posts, before he started using AI, you'll see a significant difference. You'll notice that the Diary Games stopped and the AI generated content begins.

I am in absolutely no doubt about this one.