I also love MB posts, and I love all the data. Unfortunately I think this is a bit off.
See, TV money is driving this 100%, If you get more premier match ups, you get more eyeballs watching. It helps the TV companies to add big names together. There is nothing else influencing this right now.
The B1G Academic alliance doesn't share money, or have the money increase by adding schools. Each individual university is still 100% responsible in procuring their own research grants. What is super cool about the alliance is the removal of obstacles to allow for sharing of research, and to allow for collaboration of bigger projects. It's amazing how the B1G alliance is the largest research instruction on the planet, and I am all for adding incredible research universities to the B1G, but this current round of expansions have given up all pretense and it is %100 Football TV dollars driven.