I first checked out SketchUp during version 3 and 4 days. Back then there were 8 hours of trial time, and if you only dabbled with it now and then you could make that last months. I reached a point where I wanted to buy the program (there was no free option then) during the version 5 days.
I tried to track down the pre-Google website, to see what the license was like then, but couldn’t find it. I know from having bought version 5 (around $500 I think), and upgraded to v6 and v7 for $102 each, that in those days the SketchUp income was based around people buying upgrades. At some point that was changed to the current scheme where the price is made up from $575 for the program and $120 per year to keep up to date and to be able to contact support. The $695 price means that when you buy a Classic license you’ve already paid for the first 12 months of updates and support.
All of those licenses are lifetime ones, in the sense that the version you bought will continue to work even if you stopped paying SketchUp for anything. When I paid $102 in 2008 and 2010 I was effectively upgrading which version I had. lifetime license for. These days you would have paid the $120 per year, or reinstated your support if you had let it lapse for a while, but essentially the cost is about the same.
I am curious to know if in the version 1 days that the software was due to be free for evermore after your first purchase. That is, all updates and continued support for the rest of your life. I doubt that it was like that though.
Slightly abstract question, but does the word mohawk appear anywhere in your license?