They aren't a news service. EESO for example use Internetwire which is a vendor and they're also picked up by Comtex News Network, then every kind of stock quote site picks them up from those guys. Those guys, IHUB, Yahoo, brokers, etc etc
About Internet Wire
Internet Wire, Inc., distributes direct company news, including press releases, financial announcements, graphics, audio and video files, and other time-critical business communications materials, to a worldwide audience of media, analysts and consumers. Internet Wire content is republished on leading Web sites and syndicated on leading distributors, including Bloomberg, COMTEX News Network, iSyndicate and Screaming Media. Incorporated in 1999, the Company is based in Los Angeles with offices in New York and San Francisco. For more information, contact Internet Wire at 5757 Century Blvd., Suite 365, Los Angeles, CA 90045. Voice: (800) 77-IWIRE. Fax: (310) 568-8288. Email: info@internetwire.com.
Real-time, subject-specific, newswires consolidated from Comtex's large variety of premium publisher partners. Comtex CustomWires are delivered continuously throughout the day and enhanced with metadata to meet your customization needs.