They look like they are involved in signal routing. I notice there are silence clips on them (though don't know if these were being used or if they're just being kept handy there, as in if you need a block of silence for some reason, you could grab one from any one of these tracks), and some of them are variously panned hard left and right, and they're sending their audio to different destinations - the pre mix Reaktor, the post mix Reaktor, etc. So I don't know precisely how they work but they're part of the routing, and maybe of the smartmixer.
For instance if you use mono signals, you could put two signals through one audio channel at the same time, one panned hard left, the other hard right, and select the balance between them at the destination by automating the track's pan knob, or kill one or the other entirely. Then re-center and maybe stereo-fy the output signal before it's heard. Stuff like that.
