Gonna address this so that we’re clear: yes, we know the NPL is not open-source by the OSI definition. We know the website is wrong and will get around to fixing it soon. But we’ve determined that the NPL is most suitable for this project to maintain a healthy fediverse.
If you have a problem with the licensing, you’re free to use other software.
Update: We've changed the wording of the last point on the website. This may take a few moments for it to appear on your end.