What do you mean by "they don't work"?
Turbonators work, they simply swirl the airflow at the carb, it is the overinflated claim the devices make is what we are discussing, which I reckon would be very dependant on the vehicle, the condition of that vehicle and driving habits.
Well first of all I cannot believe this baby got revived but oh well.
I am gonna go out on a VERY short limb here and say if a device doesn't do what the manufacturer claims it does (no matter how outlandish the claim may be) then it flat out DOES NOT WORK period. I don't see how you can think even though it still spins air it is working, if your HDTV turns on but only outputs an SD picture with an HD source would you say it's working? I know I wouldn't.
Just so everyone knows I have had better mileage since I took that POS out.