There's a config option in the NotEnoughWands file - seems like the default is to disable fake players altogether.
# Factor to apply to the cost when this wand is used by a fake player (a machine). Set to -1 to disable its use this way
D:acceleration_wand_fakePlayerFactor=-1
# Factor to apply to the cost when this wand is used by a fake player (a machine). Set to -1 to disable its use this way
D:acceleration_wand_fakePlayerFactor=-1