Their list:

    delves
    crucial
    potential
    these
    significant
    important

They're not the first to make this observation. Others have picked up that LLM's like the word "delves".

LLMs are trained on texts which contain much marketing material. So they tend to use some marketing words when generating pseudo-academic content. No surprise there. I'm surprised it's not worse.

What happens if you use a prompt containing "Write in a style that maximizes marketing impact"?"

('You can't always use "Free", but you can always use "New"' - from a book on copywriting.)