For as far as I know:
Fake client is not a bot.
A fake client is an entity that looks the same as a player/bot but not acts the same.
For example a record bot (for surf or whatever) is a fake client, it does not behave like a bot but looks like one.
Fake client needs instructions on what to do or they won't do anything.
I have no source for this and it's just how I assume that it is and what makes sense for me.
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Only helping out with minor things through forum.