[WBB fan]

I can think of two reasons why one might care about attendance:

• If you go to the game yourself (and to a lesser extent, if you watch it on TV), higher attendance, and more enthusiasm amongst attendees, makes for a better experience.  There is nothing quite as watching a live sporting event along with a sold-out crowd that is rocking the stadium.
  
• A louder, more energetic stadium and fanbase may impart its energy to the team and help it do better
  

BC

I think there's a subtle third reason. Recruits may be affected -- wanting to play for a school where there's an enthusiastic fan base, in front of large crowds.  As for the players already at Stanford, a strong fan base, good attendance, makes them feel good about where they are, can add to their desire to excel.

[WBB fan]

I can think of two reasons why one might care about attendance:

• If you go to the game yourself (and to a lesser extent, if you watch it on TV), higher attendance, and more enthusiasm amongst attendees, makes for a better experience.  There is nothing quite as watching a live sporting event along with a sold-out crowd that is rocking the stadium.
  
• A louder, more energetic stadium and fanbase may impart its energy to the team and help it do better
  

BC

I think there's a subtle third reason. Recruits may be affected -- wanting to play for a school where there's an enthusiastic fan base, in front of large crowds.  As for the players already at Stanford, a strong fan base, good attendance, makes them feel good about where they are, can add to their desire to excel.