Like I specified in the post: they cannot use the OBD2 data to increase your personal rates.
However, they can use the data they glean to make judgments about the owner class of that car, and from there, adjust the rates for all FRS/BRZ owners with that insurer.

This allows them to say they will only lower, and never increase your personal rates based on your OBD2-logged driving habits (how else would they get people to sign on?), but lo and behold, once they have enough data to draw statistically-significant conclusions about a certain class of driver, they can use that to tweak their calculations.

Of course, that's the explanation I got, and it makes sense to me, because insurance companies are always looking for ways to more accurately gauge their risk, if only to protect themselves financially - and doing this OBD2 stuff is one way they can do that, but it only works with large enough samples.

Just wait until the day all insurance companies begin mandating this, or face steep surcharges or policy cancellations.

...and the day that the data gathering and reporting technology is built in to every new car.

I believe most new cars already have these black boxes already built in. :thumbdown: