It just had to be a scam.
Is it a scam ?
Perhaps its a placebo device , in which case , it could be money well spent.(cough -cough)
Just look at the alternative medicine and vitamin suppliment trade.
Muli-billion dollar industries that dont offer much scientific proof of what they claim actually works.
I admit ,some vitamins and alt medicines are proven to work but not all.
But it makes people feel like they have some control in improving thier lives and some even feel better.
This and many other FE devices probably don't work , but if buying it helps someone to revise their driving habbits and reduce their consumption that way they will be happy - and good on them.