Agitate is currently in alpha. New accounts require an invitation code. If you have one, create your account here.
TL;DR: Agitate's privacy goals are lofty but shortcuts will be taken during initial development.
Agitate is nonprofit and expects to remain that way. No user data will be sold nor will your user behavior be monetized in any way. It is a core part of the Agitate ethos that there is no bias built into what the system serves you, and that would be ruined the moment money got involved.
Agitate also aims to use demographic data differently. Initially just location and age will be used as conditions for filtering results. That list may increase but Agitate is not eager to define groups — it would prefer to use the framework for users to define it for themselves.