Joe, you have your facts wrong. SketchUp was never available for free under @Last. The free version was released after Google purchased SketchUp. Their reason for offering a free version was related to Google Earth. They thought that by offering a free version of SketchUp, they could get the users to draw 3D buildings and submit them to populate Google Earth. Google did not make that a secret, either. Unfortunately for Google, most users of the free version found they could use SketchUp to draw other things like woodworking projects and cars and spaceships. Google resorted to using other technologies to create the 3D content in Google Earth. SketchUp no longer filled a need for them. Had Trimble not come along and purchased SketchUp, it would have likely gone the way of many other applications Google purchased, wrung out, and discard.
I understand that the market for your extensions and other materials has gotten narrower. Mine has, too. Still, I’m not blaming Trimble for that.