To simplify the answer in the Anahita 0.9.4 (existing demo) take Photos and Discussions out, and what's left is the Anahita Social Engine. Anahita Social Engine is also accompanied by the Anahita framework - available as a plugin - which provides all the required APIs for developing social apps.
We will be offering the Social Engine part for free download (Yes as free beer) and distribute everything else (Social Apps, Extensions) via paid membership programs: Partners, Community Members etc. Of course all the distributed code from Anahitapolis will be accompanied with the GPL 2.0 license which means once you obtain a copy there will be no restrictions on how many times you can use it. Anahita is a commercial open source project, which means while being "free as liberty" not everything is necessarily "free as free beer" like the other none-for-profit projects such as Joomla or Drupal.