How is one unable to distinguish ads from content? Even without the visual cues of div separation and "Ads By ____" inset, there's a huge difference between th

How is one unable to distinguish ads from content? Even without the visual cues of div separation and "Ads By ____" inset, there's a huge difference between the following: "The history of knitting, yarns, and crochet" "Thousands of Knitting Yarns FREE! Get quick and easy patterns today!"