It’s up to Trimble to license the software however they wish (I own 3 licenses). I would prefer licensing to be base on functionality rather than usage type. That’s too much like income tax. “Did you make any money? Hand it over.”
But then if Trimble were a non-profit and sold Pro for $20 that would be great also. When purchasing software you can’t control the license terms or price. You simply decide if the software is worth the investment to you.
Honestly I think the non-commercial free Make version makes is way too easy for people to cheat. Or even to feel entitled to the free version.