As in many of these stories, what's not made clear is why the credit lines are being cut. The man featured claims to have carefully kept the credit cards he uses to finance his business used at no more than 1/3 of maximum capacity. This seems like an ideal customer.
But, like many of the people featured in these stories, their Exhibit A is in the construction business. The companies cutting his credit lines are probably right that it's dangerous to give him too much room to run them up.
This article available online at:
http://www.theatlantic.com/business/archive/2009/03/credit-cut-to-the-bone/1348/
