I have heard all of the arguments of why Apple will never release iMesssages on other platform, but what if? In this year where it seems that all social networking services are having issues with privacy, Apple should seize the moment. Making it available to other platform by bundling it with iCloud. Make iCloud available to all other platform and offer some perks (iCloud photo backup thru the app for exemple) if the users pay for some iCloud storage. Integrate FaceTime in it of course.While making a sticker/addons Store would monetize it! ICloud Photo could allow to only backup photo, but to share pictures with groups of friends thru iMessages. This would undoubtedly increase the revenues of iCloud and solidify their stance on privacy. Two wins for Apple.