Because it's the Bears and between Packers, chance of Lions on thanksgiving, and the need to fill at least 2 primetime games every week, and often more, plus the limits on the best teams doing it every week, the league doesn't have many better options. Yep. I've heard Bears consistently draw well on prime time viewers too. Makes sense as its the largest 1 team market in the NFL but man recent Bears primetime games have been so incredibly awful and unwatchable with the exception of the Steelers game last year.