Take the case of Paul Smith (not of kitschy designing fame), a San Diego resident who was alarmed when his credit card limit was recently reduced from $7,000 to $1,400. Smith's credit score is 751 and he couldn't think of a reason why the company would take such rash action, so he called the carrier (HSBC) to get some answers.
A representative told Smith the action was "due in part to the financial situation in California. Also in Nevada, Florida and Arizona." If credit cards aren't all about personal finances, the credit cards sure are full of surprises.