eh, it's all PR, no one really wants to be associated with that, one of the reasons why Apple forced Tumblr to remove porn which in turn decimated Tumblr's user base.
That makes very little sense. Is absolutely anyone going to decide against buying an Apple device, because Tumblr is on the App Store?
I absolutely can believe that some households are going to buy Apple devices because they can be relatively sure that their kids won't find porn on the App Store.