If you check the regs carefully it should become obvious that the ONLY way the FAA gets involved with models is when there is compensation which is what has been used to define commercial operations in aviation for many decades.
Full scale is capable of interstate commerce, They fly through navigable airspace used for interstate commerce. Model cannot fly far enough for interstate commerce and are not carrying cargo. No cargo no buddies riding thus no commerce in the traditional meaning of commerce, that is the model is not carying goods or people across state lines thus this is intrastate and the FAA has no business with intrastate commerce per the Constitution. Commercial flying, be it interstate or intrastate, for models has not yet been decided as far as I know.
I have a private license and I am fully aware of the FAA's commerce rules.
I am sure that the FAA response to any modeling activity that crosses the line into commercial application will be draconian until those actors get in line with the FAA's approach to flying.
Yes we must all get in line. Some of us will line up right to the gas chambers.