It's as much an "ad" as this Steam preview was: https://www.macrumors.com/2010/05/0...for-mac-including-portal-and-team-fortress-2/
which is to say, not at all.
We preview some Mac and iOS software from time to time. They aren't paid ads. They all can't be "Steam for Mac" caliber announcements, but it's relevant Mac content that is exclusive to this site, and from a long term Mac developer. If you'd rather, we could always post another Verizon iPhone rumor.
arn
Ha ha ... good one. I for one like the odd product info post along with the rumors. It's like having good news along with the not so good that rumors so often sadly are.