2024 Week 5: Idaho (3-1) @ UC Davis (3-1) I have two different theories --
One is that the number is some formula like regular tickets sold or distributed and student tickets claimed or scanned. Meaning there is some sort of floor reflecting season/corporate/staff ticket counts that UCDH Stadium can't go lower than regardless of how few students or one-time fans show up, but there's a potential for spikes like for Orientation. In order for this theory to work there would have to have been some sort of ticket special or giveaways at the TAMC game (I wasn't able to make it) to make up for the lack of student attendance though.
The other theory is that maybe the Running of the First Year students weren't counted either due to the process of lining them up or an error. That could account for a few-thousand swing and put this weekend's attendance above 10K which also looked right to me.