There was a time when conference expansion in college athletics was driven by economics, and that certainly was understandable. You probably remember this period in history. It ended less than a year ago. It ended when Nebraska joined the Big Ten, Colorado and Utah turned the Pac-10 into the Pac-12 and TCU accepted an invitation to join the Big East. What happened to change all that arrived in April, when the Big 12 signed a $1.2 billion contract with Fox Sports for rights to its second-choice football games.