As someone who has seen explicit video 
and content 
maliciously shared into zoom meetings to unwitting attendees along with experiencing coordinated āZoom bomberā attacks that completely destroy sessions 
, I am opposed to open Zoom meeting links being advertised anywhere public.
In saying that, there are ways to manage this safely if the correct measures are used.
However, Iām not in favour of changing the current OM set up which I think works great and as Toby and others have mentioned above is structured that way for good reasons.
Instead, maybe those interested in this next step could instead use the mini-gig format but run it in a hybrid fashion whereby the āin-personā audience attends on zoom (with mics and cameras on) via the same process as used for the OMs but then we also live stream it onto YouTube (using Zoomās live stream option) so that can be shared publicly to a wider audience.
This would maintain the integrity of the OMs but give the community a separate platform (outside Justinās live streams) for performing to a larger audience if they so wish. Therefore you get the advantage of a friendly āin-personā audience giving you cheers and claps along with more diverse(?) responses from the public YouTube audience. Best of both worlds? 
I would be happy to tech support this option if anyone or any group wished to try it (assuming it was approved by the moderators).