Hi All,
The Zanata development team manages the Fedora Zanata instance. Alex Eng is part of this effort. We use piwik to track the general usage that Zanata is getting. We use the Red Hat instance because in that way we can see and combine the data from all the Zanata instances we manage. We use it to track things like which browsers are being used to access it, what are the pages that are most visited, etc.
This helps us a lot to determine which features need greater priority, or whether we should test that certain pages work perfectly in mobile browsers, for example. As far as I have seen (or am interested) the data piwik gathers does not include user identifying information, and it has never left the Zanata development team for that matter.
Let me or Alex know if you have any other questions.
Regards,