The fact that fewer and fewer tickets are being sold for lower and lower prices and i see even more of happening when people see what their money will be paying for, will say it all.
2017: 5 teams had attendance under 90% capacity, Cin. Oak., Jac., Was., Rams
2016: 5 teams had attendance under 90% capacity, Was., Rams, Chargers, Cle., Oak.
2015: 3 teams had attendance under 90% capacity, Rams, Oak., Was.
2014: 3 teams had attendance under 90% capacity, Rams, Oak., Was.
Looking at mixed messages overall. Some teams are attracting more people, like KC and Dallas. Some have steadily lost a few, like Pittsburgh or Denver. Some have lost more, like NE. Some appear to be more reflections of their stature, like Denver's marginal decline paralleling their slide to the bottom of their division. Others seem to be tied to something else, as with NE again, which continues to win but which saw a drop in attendance of nearly 1k ticket sales on average.
Attendance Snapshots:
Dallas
2017: 92,803
2016: 92,539
2015: 91,459
KC
2017: 75,610
2016: 73,328
2015: 74,086
Pittsburgh
2017: 64,084
2016: 64,312
2015: 64,356
Denver
2017: 76,566
2016: 76,774
2015: 76,922
Green Bay
2017: 78,161
2016: 78,215
2015: 78,413
New England
2017: 65,878
2016: 66,829
2015: 66,829