.... if next year I decide I want to fly commercially and I use photography from my amatuer days on my commercial website, would I have been committing a crime post factum?
If at the time of the flight your INTENT and actions are Hobby/Recreational then no laws broken. The FAA doesn't mandate the sale/us of your pictures but rather the rules that are in place during the flight itself.
It's been noted MANY MANY MANY times that images taken during a hobby flight can be LEGALLY used in a Commercial purpose later so long as they were originally taken legally.
Your argument doesn't hold any substance . . . .
Yes sir REALLY!!!......Really?