It is not the Giants stadium. The SF Giants play in AT&T Park on the San Francisco waterfront. It is the 49ers stadium that was built in Santa Clara.
Look at the 49ers attendance, since the move its been abysmal, you can’t have your stadium 50 miles away... the guy sitting during the national anthem has nothing to do with their poor attendance... being too far away, too costly and a crap product are why...
Their attendance has been a joke since they moved, and its not likely to change anytime soon