I'm of the opinion that you should probably provide Source Code on a "Source Available" basis to people who ask and have a need to see it to audit or self-compile. The lack of "Open-ness" in your code is disturbing.
I won't comment or judge on your decision to refuse to offer this software on a Libre basis. You absolutely have the right to monetize as necessary; especially if this code is speaking to a backend infrastructure that you maintain for it. Even if all you do is aim to break even and pay for those servers.
The experience is extremely unintuitive. I couldn't get your app to work at all on my privacy enforcing browser within the confines of my privacy enforcing LAN. (Yes; I do/did enable WebRTC and the other required technologies, however they're enabled in a privacy respecting manner.) Neither of my devices would show or remain connected once added. There were no popups or information given to me by the app to troubleshoot the issue; and I'm not going to crank open a Dev Console for something that I can't contribute to anyways. If your software is going to remain closed in source; "It should just work™".