I started writing on the mills before SEO was a big thing. Back then, you could churn out articles fast enough to make it worthwhile for a beginner.
Now, you will get a 1,000-word description for a 500-word article.
I left the likes of Textbroker many years ago. Most of the other content mills died off.
By the time I discovered the writing boards, it was already too late. I remember when I first discovered Fiverr. My only ad there said, “I will write a 50-word article on any subject.”
Not surprisingly, I never heard from anyone.