I suspect that the reason there are no magazines specifically for teen boys, or even simply for teens in general, is the idea that to have a magazine with a target audience that openly includes teenage boys is to sanction bittul Torah – it’s not okay for teenage boys to read your magazine instead of learning, but if you market to them, you’re essentially saying that it is!
(Of course, I doubt anyone actually thinks teenage boys don’t read anything but seforim, but still, you can’t make something specifically for them.)
Does anyone think this theory is off the wall?