I like the ads and often sit down to a pile of mags and skip the articles and read the ads to see whats out that's new and might be worth a try. I go back and read the articles too, but the ads are the only way for some of us poor isolated stitchers to keep up with new developments and tools.
As for using the designs in a magazine - well, I love to see the patterns, and often use them as a starting point, but I've never followed a pattern exactly in my life. Ditto recipes. And I don't encourage any of my students to slavishly follow patterns either. Change the borders, turn the blocks on point, be different. For their first quilt (usually a Round The World with a pieced border) I often let them run out of fabric before they finish their planned borders, just so that they can get used to the feeling early. Change the plan and get on with it. No-one has ever been unhappy with their first quilt yet and they will never be traumatised by running out of fabric just before the end of something - at least not totally traumatised (lol)