I am a developer, you're right. I think I'll fork it and add my own ldap auth in. Good chance to learn Rust.
I don't like it because that's exactly how things like this RealVNC thing happen. These companies all start with good will, we have a free tier, we are open source, we love the community. Then one day they snap it all back, say "Hey we never said it'd be forever, did you look in subsection 6 of section 42? It said in there that your license wasn't a license and now you need to pay up" So yeah, especially in context of RealVNC I'm real jaded against "good will companies".
You want to charge for your product? Super, do so. Don't lie and say you're doing good and then rip it out later. Gitea is a good example of that.