You're looking at an ad for what may have been the world's first multiplayer graphical online gaming service, Games Computers Play (1985). It may also have been the world's first graphical multi-user environment, as it predated the Lucasfilm Habitat beta test for the C64 (1986) by six months or more.
One of the posters in the forum thread linked above mentioned that he/she found the creators of the service, whom I'd love to talk to myself. I'm trying to get in touch with that poster, but if anyone knows anything about this service (including info about who created it) or has stories to share, please email me here.
Discussion Topic of the Week: What was the first game you played with another human (or humans) over a modem?