

Isn’t that because Dan hasn’t open-sourced his project yet
Wrong: https://github.com/pixelfed/pixelfed/blob/dev/LICENSE
and doesn’t let anybody else contribute?
Hmm, while there have been 158 contributors, a very small percent were from the other developers: https://github.com/pixelfed/pixelfed/graphs/contributors
This information is pretty easy to look up.
Agreed (mostly).
Just because something isn’t illegal, that doesn’t make it morally right. The inverse also applies.
Even though the First Amendment prohibits government suppression of speech, it doesn’t mean that the expression is immune to consequences from society including non-governmental suppression.
I think the “no arrests were made” observation was meant in relation to your last point, not the first at all.