Since Ambitions, there has always been the chance that future patches and updates could trigger in game advertising. The latest 1.29 patch has turned on an advertising feature for Sims 3 Store. If there is anything you do not have installed, the game will auto-generate a “featured” item for your to purchase.
These featured items come from the newest folder added into the game file: Featured Items
❗ This in game option will not appear if you untick “Enable Shop Mode”
Thanks to asterravos for the above photo!