Seems to me like a favorable outcome for Apple. I mean, let's be honest, prohibiting out of the store purchases would not fly anymore anyway, it's not something that society at this point would accept. But the judge has confirmed that Apple does not need to do anything besides the bare minimum, and that they are within their right to make any linking to the outside payment information as awkward as possible (e.g. by requiring the user to type the link manually). In fact, Apple does not need to implement anything at all — they simply are not allowed to reject apps that include a link to outside payment info.