Thanks Otto, you're correct. I talked about the two separately:

WP.com has 25m users/300m uniques.

WP as a whole powers 15% the top 1m sites on the internet (according to http://w3techs.com/technologies/history_overview/content_management/all).

I try to be very clear whenever I talk about WP.com vs WP.org, but sometimes people conflate them.