There is also the join.me program. The person broadcasting needs to download and install the basic version, while the person receiving the stream only needs to click on the link. It consumes the least amount of resources and doesn't cause lag for the broadcaster. I'm not sure about the 24kb/s claim – it's unlikely, but it's worth a try. During the stream, as I mentioned on the portal, it's enough to show the network settings and not close that window until the end of the game (without using fullscreen mode).
In any case, consistency is key.
If there is even the slightest opportunity to prevent map hacking, it should be done.
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