In the days of yore, you’d sometimes come across a spread in a tabloid that didn’t seem quite right. The typography was off, and the content seemed to make too big a promise: “Revolutionary Formula Lets the Stars Lose Weight without Dieting or Exercise” or “‘My Eyesight is so good I can practically see in the dark,’ Says Amazed Eye Doctor!” When you put on your reading glasses you might have seen the word “advertisement” or “advertorial” in small print at the top of the page, and felt a little cheated.