The interesting thing about the conference networks is how many synergies there are to having more schools. The SEC schools are almost all worth less than Texas, but the SEC network earns 1.6x as much per school as Texas gets from LHN -- and ESPN is losing money on LHN but making a bushelfull on SECN, meaning that when distributions are revised, schools like Mississippi State and Vandy will be doubling up Texas.
This puts some light on the question of why the B1G wants to continue growing. If revenue increases faster-than-linear in number of schools, they stand to increase per-school revenue by growing, even with relatively weak names.