Exactly my point. No one outside the US (not sure about Australia) uses SMS any more, it's a ridiculously antiquated technology. I guess Americans still cling to it because it's a huge country and they can send SMS to everyone they know in the whole world for free, since everyone they know is in America. For everyone else (or Americas who actually have friends outside America), SMS is stupid because sending them internationally is horribly expensive.
Yes that exactly what happens. iMessage became the "your package is being delivered" app since pretty much only parcel delivery company are sending SMS.