Comedy sketch or not, there are a lot of people that don't understand that these are satire, and considering how much they're riding on this game, it was a shit PR move.
Think of how Coca-Cola might continue to put out expensive advertisements, even when many people already buy Coca-Cola. Most people aren't going to run out to get one when they see an ad, but they could consider it when they walk into a store. "Oh yeah, they've released a new product, haven't they? Maybe I should see what it's all about." The fact that they are expensive advertisements also lend to credibility and brand loyalty, which is what FFXV being on Clueless Gamer is all about, in the end.