It's a joke because the story itself has functionally limited shelf life. What if ads for Metroid Prime 3 started tomorrow? Or even next week? This article then becomes a pointless snapshot of how Matt Cassamassina was worried in early August about how there might not be enough ads for a game. This might as well be a blog post on GoNintendo.com or a livejournal entry, followed by the mood he's in or what emo song he's got playing in WinAmp.
And form a journalistic point of view, what is the point of this article? This just simply is not newsworthy. News is meant to report events, not fabricate worries about potential events. And if it's meant to be editorial, then it is very short-sighted and possibly meant to rabble rouse instead of make pointed arguments. In legitimate journalism you send the writer of crap like this back to his desk or you even send him packing. But apparently journalism skills are not a requirement to write for gaming sites, which is why it is hype-driven to the point of something not having enough hype is newsworthy to them because they are used to hype.