Fader and Cornerstone were early pioneers of the magazine/agency model, but continue to evolve with new talent and a laser focus on creating culture. For the past 18 years, it’s been an open secret that Fader magazine and creative agency Cornerstone have been operating under the same ownership. Former music executive Rob Stone founded Cornerstone in 1996, eventually bringing on his childhood friend and fellow former music exec Jon Cohen as a co-CEO.