wrote ...
Are there any incentives for this kind of "continuing education"?
I am thinking of something like: attend a safety seminar, get your
attendance signed off by the presenter, send the sign-off to your
insurance company, get a few bucks off your insurance.

OK,... you just described the Avemco program for Rental Insurance (maybe for
owners as well?). Go to a safety seminar, pickup a signed blue "wings" card,
get together with a CFI for some mutually agreed airwork, and AVEMCO gives
you 5-10% off the annual bill. I think they have a deal with the John &
Martha King home study programs as well. Maybe the other insurance outfits
do something similar?!?