I bought my Lightroom 5 retail last December full price and I use it with PS Elements. Retail customers are left out at something that could be very practical. One year Lightroom mobile support for retail customers would seem to be appropriate btw.
The Lightroom mobile service utilizes cloud infrastructure to seamlessly sync image data and edits between the desktop and mobile devices. We’re delivering these services through the Creative Cloud and the Photoshop Photography Program. These plans allow us to continue to deliver innovation and ensure that apps and services are always updated. Due to the nature of cloud services having ongoing costs, Lightroom mobile is not something that can be offered for a one time fee.