Eh i dont fully agree but acknowledge there’s space to disagree. It may not be open source in the way that “its GNU-Linux not Linux”; its not copyleft or “Open Source” but it is open source-lowercase o/s. The source code is available, its accessible under a license that allows you to see it and use it in your own projects, with some restrictions — just like the other main open source licenses do, only to a different degree. There is software licensed under Creative Commons noncommercial licenses, eg, even though CC advises against it. The reasoj I’m posting it on this community though is because it’s self hostable more than it’s open sourceness or lack thereof, though.