All Major League Baseball attendance figures now are based on the number of tickets sold. There is no reference to the number of people who are actually at the game.
Other sports vary, but they will always look for the highest number they can, which is going to be tickets sold almost all the time.
I was going to mention the same thing. Depending on when the game is and who the opponent is, you can sometimes get tickets directly from the Dodgers for up to 70% off the ticket’s face value. It still counts as a ticket sold in terms of attendance numbers.
It does crack me up, however, when they announce in the eighth inning that the attendance was 47,000+ and I know from experience that there weren’t nearly that many people in the stadium.
Yeah, I noticed at Wrigley Field yesterday that the announced attendance was 40,000 ish, which is pretty close to Wrigley’s capacity. Never mind that there were quite a few empty seats.