MSN

MSN is the web portal operated by Microsoft, aggregating news, weather, entertainment, and other content on msn.com. It draws articles from a set of publishers into a single feed, and it is accessed through a browser as well as through Windows and mobile integrations.

MSN's ads.txt file lists 121 authorized ad systems, reflecting a portal built on aggregated, syndicated content. Sales houses named in that file include Arkadium, Dailymotion Advertising, Outsourced Ad Ops, and CAIRORCS MEDIA, indicating that advertising across the portal is sold in part through third-party partners rather than directly.