Mainstream audience doesn't care about Final Fantasy's reputation. Advertising is more than just maintaining a public image, but is also about creating a relationship with would-be customers. Right now you're holding a skewed opinion that a satirical, negative impression of the game is more valuable than the term, 'Final Fantasy 15', being planted in everyone's heads. 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.