Looking for a reason to buy an iPad edition of a magazine? Hearst hopes this will do the trick: Readers who buy the publishers’ titles from Apple’s Newsstand will get them before anyone else — on or offline. This feature appears to have popped up today, and there doesn’t seem to be any other details about the offer, like the number of days in advance that Newsstand buyers will get their iPad editions. I’ve asked Hearst for more information. Right now, Hearst is the only publisher offering the option, for 22 of its titles. An Apple rep says it will be happy to let other publishers try the same thing. This looks like the first time any publisher has tried an early digital “window” for their magazines, anywhere. Hollywood has recently warmed to the same idea when it comes to selling their movies online. Bigger context for the tweak: Magazine publishers, who were once giddy about the prospects of selling their titles via the iPad, have sobered up.