os/2 2.1 was free during some periods in the 90s, I and several friends got it just for the free floppies. Though none of us paid for windows either, I guess it was free as well.
What do you mean? There is a whole library of thousands of win32 games spanning more than 2 decades and the community is tracking and reporting bugs in each and classifying their level of performance.
That’s one of the most successful computer projects I’ve heard of.