I have a long long list of blog posts I haven't got around to writing. Creating the skeleton is easy, but filling in the details is time consuming. I can see a use for this service to get someone else to do that. I don't really see a big deal with this, so long as everyone involved is credited.
I'm in the same boat. I've tried using Dragon, because talking is easier than writing for me. But then, I end up with a lot of umms and uhs and unstructured posts. Copywriting is super important, very difficult for non-writers, and time-consuming (for non-writers)