system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:With the amount spent on superbowl ads, why don't they keep the ads on the air for a longer time period - say, a few more months?

It seems like these ads are pulled off the air too quickly.
gpt
Some DO run longer. The Volkswagen commercial with the little kid dressed up like Darth Vader, for instance. In fact, many Superbowl commercials play for a good while after you've initially seen them, unless they were specifically designed with a football or Superbowl theme when they were shot. Then they're only relevant for that short time. 

The reason you *think* they don't play very long is because your brain lies to you. You're extra attentive to commercials during the Superbowl because...that's what the marketing apparatus has conditioned you for. After the Superbowl, commercials are just another opportunity to get a beer, take your dog out, or check on your hostages. They get lost in the background noise. They lose their novelty, and they're just another obnoxious interruption of CSI: Middle Earth.