Per your edit, there might be a blind spot in the study. Consider when you've searched for a recipe, and the top result you find always starts with "My cousins showed up one day and I had to scramble to make something . . . ". A big story you don't care about before you can get to what you want. That's happening because Google is giving those kind of recipe posts a higher rank. Ironically, adding this human story to the post is there for the sake of robots, not people.

I wouldn't classify posts like that as spam, exactly. I still find the recipe I want. But they do make the experience worse.