While Jitsi is open-source, most people use the platform they provide, meet.jit.si [http://meet.jit.si], for immediate conference calls. They have now introduced a “Know Your Customer” policy and require at least one of the attendees to log in with a Facebook, Github (Microsoft), or Google account. If you prefer not to self-host Jitsi and be identifiable via your domain, there’s jami.net [http://jami.net] as a replacement for Jitsi. It is a decentralized conference app that requires you to install an app. However, it’s open-source and account creation is optional. It’s available for all major platforms (Mac, Windows, Linux, iOS, Android), including on F-Droid.
Yea, the company does not want to be an accessory for crime or illegal activity. That’s to be expected if they want to keep their business running. But that won’t stop people from raging and claiming the project is now going to die.
It may be reasonable for them, but for the people using it this kind of sucks. I’m one of the latter so as far as I’m concerned, this is a bad thing.
If you rely on a single service this much you should either pay for it or selfhost.
Edit: What I wrote might sound aggressive but I don’t mean it in a bad way. I understand your concern, just wanted to point out that one should be ready for free (or any for that matter) services completely changing direction, conditions, or getting decommissioned.