It seems that at least part of these are stolen/copied works from others.
https://www.instagram.com/reel/DdHGZhytcx8/
https://annaluciawrites.substack.com/p/how-to-steal-my-work
Many people will sleep better at night knowing their own AI work was recognized by another's AI.
The thought of everyone becoming LLM middleware tires me out in a way sleep doesn't help.
I sleep best after a long days work which is intellectually challenging, not pressing Enter/Approve with Claude for the entire shift.