Opinions on Talky.io

I've been reading about WebRTC lately and found https://talky.io. (I'm in no way affiliated with them.) The service seems solid, and it's free for up to 6 members. (The company providing the service sells access to a network of TURN servers along with a React frontend that simplifies client dev.) With all the talk here of Zoom/Jitsi/etc, I'm surprised I haven't seen it mentioned here, and I'm wondering what Hacker News knows that I don't. (As an aside, I'm also sutprised by the relative lack of mention of https://whereby.com, another WebRTC service that I'm also not affiliated with, but for my money, has good UX and does all the right things in terms of engineering WebRTC infrastructure.)