Interesting, I didn't know the apps were closed. (edit: seems they're not, source code is here: https://gitorious.org/owncloud/android-main)

My point was not price though, but freedom. If people are looking to move out of the cloud and take things home, I suspect this is at least in part driven by an urge to take control of their data and become more independent.

Controlling the tools is, by many, considered to be an important part of that.