I dont get what your saying , how would they lose on that. in fact what advertising revenue??
Networks, such as CBS, NBC, etc., fight for broadcast rights. The NFL's product are its games, which the networks bid for broadcast rights. The NFL sells its broadcast rights for billions.
In turn, the networks recoup and profit from selling commercials to advertisers. Networks determined how much to charge advertisers for commercials based on its calculation of anticipated audience size per commercial. The more eyes expected to see each commercial, the higher the networks will charge advertisers per commercial.
Pirating reduces the size of the calculated audience in which the networks determine how much to charge per commercial. For example, FOX calculates the audience size for a Rams/Chargers will average 5 million viewers. The network determines the ad rate for 5 million viewers as $500,000 for a 30-second commercial.
Conversely, the pirated audience size is 500,000. FOX has devalued its anticipated ad rate. If it had not, the network could have possibly charged at additional $50,000 for the 30-second ad spot.
Additionally, the NFL computes the
value of its audience by calculating the size of that audience, which the networks are
bidding for. Knowing this allows the league to decide what is an acceptable winning bid from the networks, in particularly an opening bid for broadcast rights.
In summary, the league could boast its winning bid contract by the numbers siphoned away by pirating. Aggressively going after pirating benefits the networks' rate for charging advertisers, which benefits the NFL's goal of maximizing how much it can potentially profit from selling its broadcasting rights.