I think the take up is being driven by Direct Line, they supply the box and get to sell the data, probably sold to Motability under “Increased Safety and Accountability”, perhaps along with a reduction in the insurance block cost vs not taking it in their contract submission.
Have said before, if the black box of damnation becomes mandatory on my lease renewal then I’m 100% out.
Can see many folk leaving the scheme if the boxes are as pox-ridden with errors, threats and lifestyle comments as we’ve seen, soon have people cancelling their leases!
In life, it's not who you know that's important, it's how your wife found out.