Yes, by default content on edgeryders.eu is public because we think that being open about ideas and initiatives and "working out loud" are best suited to attract attention and collaborators from within and without the Edgeryders online community.
There are two exceptions:
Everyone can start private message threads. They look and behave very similar to normal topics in this platform, but are only visible to the individual people entered as recipients (which can be a large number though).
When somebody works with Edgeryders as part of the team for a paid client project, they get access to a non-public workspace category ("forum board") used for internal coordination of this project. Not all projects have or need such a category, though.