Doing some digging tonight…
Jitsi
tl;dr— “Open source Zoom”, can stream your conference to youtube, but really low quality audio.
I spent a bit of time this evening trying out Jitsi on their servers (https://beta.meet.jit.si and https://meet.jit.si) after finding out that they “supported” stereo and you can disable a lot of the audio processing that focuses on voice. More on that here and here.
Unfortunately, the bitrate/audio quality is so low, that even mixing a couple voices get’s really muddy really fast. Also I could not get stereo working on either beta or production.
Instagram
tl;dr—Live Streams viewable in the browser now! WITH CHAT! You can have 2 accounts at the same time on 1 stream; automatically ends after 1 hour, but you can restart.
Over the last while, Instagram has really stepped up the browser interface to Instagram. I’ve had a (hideous but functional) extension installed for a while to watch Instagram Live from my my laptop. But great news, they now support Live Streams by default in the browser WITH CHAT! 1 other account can also join in on your instagram live stream.
I believe instagram streams are mono, but I need to do some more testing there.
I’ve had good luck streaming to Instagram with a class compliant audio interface, plugged into the camera adaptor (Analog Heat, L12, NI Komplete Audio 6) — Keep in mind that instagram (and most non-audio focused apps) will only see channel’s 1 and 2 (L/R) of your audio interface and instagram is likely summing them to mono.
I’m kinda sticking to readily available/consumer tools with a low amount of setup, since my 2015 MacBook Pro can’t handle OBS, my idea is to stream with my phone. But if you want to go hard and recompile some kernels, please go on 
Instagram has a bit of a built in audience, and i find i get more people checking out my streams there, than anywhere else; but facebook :(.
YouTube and Twitch [EDIT, added…]
Great platforms, good audio quality, but my audience isn’t there.
Other drone thoughts
please steal these ideas if they pique your interest
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I think i’m going to play with “internet feedback”, watch my own stream from another laptop, take that audio, and mix it back into my stream audio, should be a good 5 to 10 second delay (on instagram)
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was also considering remixing and restreaming someone else’s stream live, but i wouldn’t want to do it at the expense of the original artists viewers. so it would need to be a collab.
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also thinking of a 12 Hours of Drone, one hour based around each semitone, 24 hours if you want to get into 24-TET
Anyways, curious to compile more ideas here, what you got?