I'm pretty sure it only counts as a "user" if you buy one for yourself, vs just having worked with one owned by a school or somebody else....
That said? 50% of the sales were "new users to the Mac"? That honestly surprises me, just because I thought we had pretty much already gone through the era of a whole generation discovering the Mac with it becoming trendy for college students to carry one around, etc.
What I observed after that was a pulling away from the Mac. Many people I know who used to use one and rely on it as their primary machine said, "Next time, I'm getting a Windows machine." because Apple was really dropping the ball in so many ways. (The keyboard issues, lines through the display due to failing ribbon cables in the laptops, discontinuation of support for 32-bit apps when many of those had no updated versions to replace them with, overheating leading to thermal CPU throttling on Intel i9 Macbook Pros in 2019, etc.)
My guess was that most M1 series purchases were from former Mac users who either stuck with them this whole time OR who used Mac, got disgusted with it and went to a Windows machine, and now are giving it one more chance.