IMO the hurricane killed attendance. I know the area wasn’t directly affected, but I bet a lot of people had other obligations. I’m sure the USF alums live all over Florida.
South Florida has a weird arrangement. They, like every other school, announces tickets sold/distributed. However, the local paper has access to turnstile counts and releases those as well. It’s one of the only schools in the nation that has somebody fact checking butts in the seats.