My belief is that oil and filter change flags (the "A" in that code) are triggered whenever another upcoming service event is triggered, unless you reach the 12 month date on the same oil when it will flag for that service no matter what (and the probably the oil should be changed every 12 months, no matter how much the ICE is used). I believe the service trigger for most people is the the required tire rotation (the "1" in the code), which sets off the service notification somewhere in the 6xxx miles range. At that point, it will flag an "A1" or an "A01" (the "0" includes checking and topping off all fluids, checking brakes for wear, suspension linkages, etc.).
So since I am swapping onto snow tires today (~3xxx miles on the odometer), I will reset the tire rotation counter on the maintenance minder, and again when I switch back to the OEM tires in April. If my guess is correct, then it should not flag for an oil change until late summer when I get into my 11th month, and it should flag for "A0" service. In 3000 miles I have only used up about 10 gallons of gas.
I think if I keep up with this routine and roughly this amount of miles/month, then it should only require oil changes every 12 months.