You're taking one game and using that as your argument, but it isn't just the crowds, it's the merchandising and television audience as well. And just because I game is "sold out" doesn't mean everyone showed up.
News stories and ESPN are talking about the NFL going into crisis mode and the owners and players having meetings with the commissioner to talk about what to do. And now players are already (most of them anyway) quitting their protests. Not sure where you've been hiding.