I set out to build my own interpretation and that's what I did. It does have an automatic extraction pattern, but also uses per side rules, if available.
I'd say the main distinguishing factor is the price point: free.
I cannot, in good conscience, charge for just scraped content. I mentioned it before, but once I complete testing, I'll release the full source on GitHub
I used to work for an online editorial in Spain, which did exactly that: charge for scraped content. You can't imagine how many customers there are for this kind of thing.
Then figure out why developers would use your service and charge them for making it easier to achieve that goal. I'm sure that scraping content is just a means to and end.
