In the video it's $2,500 for 25,000 words. I think the 10k words was a typo in the above comment.

That’s also the average ghost writing rate. Not the rate the content farm he uses pays the ghost writers.

10,000 words on a random subject that you probably never heard about before?

You'd be surprised...

It's not that they care about much fidelity to the subject or going deep anyway.

And half of the work or more is rewritting (sometimes not even that) other sources, like online articles and such

College students regularly do this, it's called "not showing up to lecture and writing the final paper anyways" :P

What role do you have that requires that kind of output?

Corporate strategy consulting. 1 day to write 5k-10k words on a topic you have to research from scratch is not uncommon. It's all within a broad field of expertise and a sector you're familiar with, but could be products / companies / deals you'd never heard of.

I think the point here was that the ghostwriting is of really low quality. Overnight 10k reports are never groundbreaking or enlightening additions to human knowledge, but they need to be 90%+ accurate and polished enough to inform.

Are those 5k-10k words completely new, or are document templates part of this count?

I know from experience (of on-line commenting; don't judge) this word count is entirely possible to achieve, but I can't imagine sustaining it long-term, as a part of a job.

Rocket Lawyer (computerized legal doc-writing services) generates thousands of words per day, for one customer, on demand, easily.

Just choose the templates and fill in your names and numbers.

“I apologize for such a long letter - I didn't have time to write a short one.” ― Mark Twain

Sorry it was 25,000 - that includes research