in the NFL all teams share playoff revenue from tv and ticket sales. owners keep the parking and concessions but that's not a huge amount. they also have the gameday expenses so it ends up being kind of a wash.
https://www.sportico.com/leagues/football/2022/nfl-playoffs-generate-no-financial-windfall-1234658372/
as for local impact, that's a little more relevant but still not huge.
https://www.uc.edu/news/articles/2022/01/bengals-playoff-game-an-economic-boon-for-cincinnati.html