That sell-out streak started around the time they went to the SB, though, no? I lived in Boston in the early '90s, when they sucked, and they literally had less than 20k season ticket holders one year. Consider that in a city probably 5 times the size of Buffalo for a comparison. Can anyone imagine any circumstances in which the Bills have less than, say, 30k season ticket holders? I'd guess that even in our darkest years we had more than 30k, but could be wrong.
I also agree with this assessment as a general matter.