Companies that care so much that CAK is a bit cheaper are not important to United. Those passengers are buying cheapo fares, and can be replaced by the next BIS that comes along.
Any company that can offer United volume is important at this point.
Its kind of ironic that you think being a bit cheaper is not important to United. You know they removed the option of PassPlus customers to pay for the contract or add additional funds via a credit card? It has to be done by wire or check. Why? Because its a bit cheaper for United. I guess United can care about pennies but not be bothered by customers who try to do the same?