Skyrim Fansite writes: "Players respond to an in-game Elder Scrolls Online advertisement promoting a cash shop purchase.
To help promote the sale of its Senche Leopard mount, ZeniMax Online Studios (ZOS) displayed an in-game Elder Scrolls Online advertisement during Welcome Back Weekend. While game promotions and advertisements are nothing new in the ESO launch client, this is the first time ZOS has used an advertisement in the form of a system announcement during game play.
Both subscription and non-subscription players have reported seeing the in-game ad. In yellow letters, players were encouraged to purchase the Senche Leopard mount in the cash shop. The Elder Scrolls Online advertisement is said to have been broadcast in English, French, and German at different times throughout the game."