Woooooow, the way to attract a younger audience now is through cartoons? That's...special. What's their target age? 8?For Playboy, which has seen its circulation slip from 3.15 million to 2.6 million since 2006, putting Marge on the cover was designed to attract younger readers to a magazine where the median age of readers is 35, while not alienating older readers.
This also all seems very late. The Simpsons have been on a bit of a downhill slide for the past few seasons and people have been drawing Marge Simpson nude for years (rule 34, what have you done?!).