You're an idiot. Of course the nfl cares. They want as many people watching as possible.
Actually, the main thing the NFL wants is to sell tickets and gear. TV ratings are relatively low on the priority list.
That's simply false. Television contracts are responsible for the lion's share of the NFL's revenue, and raitings dictate television contracts.
That is kind of common knowledge bud.
First of all, it would be impossible for you to actually know this, because the NFL does not disclose such financial reports.
Second, you're barking up the entirely wrong tree anyway. The NFL's top priority is ticket sales. In fact, ticket sales are such a priority that the NFL employs blackout procedures to protect ticket sales from degradation due to broadcast access to games. If a game doesn't sell out, it cannot be aired in the home team's primary market area. So even if we momentarily indulge your premise, ticket sales will still remain the first line priority.
Finally, the NFL does not sell TV ad time. The ad time is sold by the broadcasters.