Okay, but then we will never agree on this.
I also have said in the past, and do so again here, that I DO wish that the Dynamic Components, the Solid Tools, LayOut and Style Builder; … were all OPTIONAL paid extensions.
BUT… the markup data itself is [ or should be ] only used by professional users, so it DOES make sense for a
.markup archive format that can only be loaded by SketchUp Pro editions.
There already IS a free viewer. I’m not against the limited free viewer as it exists now.
Again, the Pro licensees, who need their customers to provide feedback / markup, could buy a cheap 30-day license coupon that they email to their customer, and they input it into the viewer and it activates the markup feature. (It could also be made very painless on the web editions, where a coupon icon appears when a pro license holder has sent one to a user, and all the user need do is click the icon to activate markup features.)
This is no different then a toll bridge. Only those using the bridge need pay the tolls. (It’s not something I just invented.)
It may not entirely pay for development, but at least it might pay the maintenance costs.
Listen, I am a realist. Trimble is a commercial company which creates and markets commercial software services that they expect to be paid for. IMO, new proposed free products or features, are not likely to ever get implemented. If they do come about, they’d get implemented last after any revenue generating features or products. It just how business works.