Saying it's not pushing a million is not the same as saying it is selling 50,000 or even 3,000. It is implying that the figure is up in that region (even if it is half that).
Understanding is fundamental.
To be clear, I believe the Mac Mini is a very poor-selling computer and always has been. I expect that it rarely, if ever, sold more than 50,000 units a quarter at any point in it's entire production lifetime. I believe Apple ignores it because it is not worth the effort at such low volumes. They did it because they had to at the time and as soon as they no longer had to (pretty much once the Mac went Intel and definitely once the MacBook Air dropped below $1200) they stopped spending any real time on it and it will eventually be End of Lifed as was the Thunderbolt Display and Airport / Time Capsule.