That's really not a lot of beer, imo.
Let's round up and say they pulled $2M in revenue in alcohol sales. At $8 each that's 250,000 beers. Which seems like a lot but when those are sold over seven home games, that comes to 35,714 beers per game, or about 1/3 of the stadium having one beer. I would've guessed it to be higher. But maybe that's because I drink a lot.