Agree, but partially. There's also the factor I mentioned that people tend to get a succint concept and fill it with fluff to pad word count until they have something they can market it as a book.

Third point is our attention economy: our time is valuable, and more content is created every minute that we can possible evaluate, much less consume. How can you tell what is worth your detailed, deep attention span? One way is read a few summaries and pick only the one that shows more potential.

I think the draw of this service is partially due to these three points.