An ad within an ad. This can often occur when watching a YouTube video when the main video is an ad but a commercial plays before it. A play on the word "Ad" and the movie title "Inception."
It's a case of Adception!
John: I was shopping online, hit an ad for HP toner, bought some and when it arrived, there were ads for Directv inside the box! That's some serious adception.
Jane: Well, I started seeing posters for it on buses and watched the trailer...when I actually saw the movie, there were ads before the previews and product placement throughout the whole thing. Excessive adception me want to walk out!