Lets draw some pararells to real life. If I go to public space like town square - can't I take pictures, notes and records then go home and draw my analytics from it? What if I read something in a book I bought, can't I quote it?
Same thing should be with web resources even if they are creative - as long as I don't publish them I should be able to scrape whatever public resources I want and use them in my analytics, machine learning or whatever.