I was thinking, how about buying "Education" for piloting, IE books, simulator time. For a set price, pilots can buy exemptions, so say you forgot the landing lights on takeoff, if you've prepaid before the flight a set amount, the landing lights infraction won't show up, because you've practiced and therefor pilot error didn't occur
Now a price per percent, maybe 500$ per percent off, so it would cost 5000$ to completely wipe out an infraction.
Just a thought.
I also like the homes idea, maybe a familiarity one? Pilot gets 10% discount on fuel at an airport he lives close to, since he knows all the providers and which ones will give him (or her) the best deal.