This page lists advertisements, as seen in the Perplex City Sentinel.
Perplex City Publications
An effective mini banner, pointing readers at The Perplex City Website.
BBC Mind Games
This is the only advertisement on the site which is for any non-perplexian product or service. Clicking on the ad in the sentinel takes the user to: http://www.bbcmindgames.com/
Ostensibly, an ad for some sort of stone dealer, such as a jeweler. However this is something of a misdirection, as it is more realistically a potential rabbithole for the Perplex City Board Game Trail.