With the cheap junk pcs most people buy, I agree upgrades are probably not all that common for individual users. But the freebie isn't all that surprising. MS heavily discounted both 7 and 8 for a short time after release. I got 7 pro for around $40 from Amazon at the time. Free is even better and I will be upgrading those licenses to 10 for sure based on what I've seen in the technical preview.