BYU - ASU had 1.5MM viewers on ESPN in the 8:15 p.m. slot
Boise State - OK St had 0.6MM on FS1 in the 7:00 p.m. slot.
Tulane - Ole Miss had 0.3MM on ESPN2 in the 7:40 p.m. slot.
It's clear why the Big12 viewed BYU as the obvious first choice for expansion.