There isn't much point in these broadcasts, as simply watching a player fight isn't interesting. Many things are unclear, especially for beginners: why did he move like that, or why did he fight the neutrals in that way. There's no sound, no commentary. And there are fewer players who can explain things well and properly demonstrate battles with neutrals or a live player than there are fingers on one hand. It's a difficult task to comment accurately and without errors. Moreover, Miko isn't suitable for full-fledged broadcasts. This requires much more effort, time, and, most importantly, resources than the option suggested above.